x is an int variable and y is a double variable and the input is: 10 20.7.The output will be x = 10, y = 20.7
given that
x is an int variable
y is a double variable
The C++ double should have a floating-point precision of up to 15 digits as it contains a precision that is twice the precision of the float data type.
When you declare a variable as double, you should initialize it with a decimal value. For example, 3.0 is a decimal number. However, if you initialize it with 3, it will also work fine because although 3 and 3.0 seem to be identical i.e., an integer, there is a big difference in their internal representation.
the input is: 10, 20.7
after execution of the statement
cin >> x >> y
The output will be x = 10, y = 20.7
because x is declared as integer variable so it will print the same
y is declared as double integer variable so it will print same as given input , if it is declared as integer variable then it will be printed as 20
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help me solve this pls
Answer:
30.25π mm^2
Step-by-step explanation:
The area of a circle is π · r^2. simply plug in the radius of 5.5 into "r" and then you square it. Squaring it would result in 30.25. Finally, you multiply it with π. Since you are multiplying two unlike terms, you put the coefficient first and then the variable. The measurements are in millimeters squared so you would have to add them after 30.25π otherwise it would be wrong.
How many ways can you make change for 70 cents using only nickel dime and quarters
The number of ways to make a change of 70 cents using only nickel, dime and quarters is given as follows:
15 ways.
How to obtain the number of ways to make the change?The value of each coin is given as follows:
Nickel: $5 cents.Dime: 10 cents.Quarters: 25 cents.Hence the ways to make the change are given as follows:
2 quarters and 2 dimes.2 quarters and 4 nickels.2 quarters, 1 dime and 2 nickels.1 quarter, 1 nickel and 4 dimes.1 quarter, 3 nickels and 3 dimes.1 quarter, 5 nickels and 2 dimes.1 quarter, 7 nickels and 1 dime.7 dimes.6 dimes and 2 nickels.5 dimes and 4 nickels.4 dimes and 6 nickels.3 dimes and 8 nickels.2 dimes and 10 nickels.1 dime and 12 nickels.14 nickels.Which combine to 15 ways.
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Ivan must choose a number between 55 and 101 that is a multiple of 4, 10, and 20. Write all the numbers that he could choose. If there is more than one number, separate them with commas.
Using the LCM, the numbers that Ivan could choose between 55 and 101 which are multiples of 4, 10, and 20 are 60, 80, and 100.
What is a multiple of numbers?A multiple of numbers is the lowest common multiple (lcm) of two or more numbers.
The LCM shows the numbers into which the given numbers can divide without a remainder. The result is always an even integer.
Between 55 and 101, we know that 4, 10, and 20 can each divide 60, 80, and 100 without leaving a remainder.
For example, when 4 divides 60, 80, and 100, we have 15, 20, and 25.
When 10 divides 60, 80, and 100, we have 6, 8, and 10.
Lastly, when 20 divides 60, 80, and 100, we have 3, 4, and 5.
Thus, Ivan can choose 60, 80, and 100, which are between 55 and 101 as the multiples of 4, 10, and 20.
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Can someone help? I’m stuck on these. I’ll give brainliest!!
The system of equations is y = - x - 5 and y = - x - 9.
y = - 4/3 x - 1/3 and y = - 5/4x + 1/4.
what is meant by equations?
The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.The point-slope form, standard form, and slope-intercept form are the three main types of linear equations.a formula that expresses the connection between two expressions on each side of a sign.Typically, it has a single variable and an equal sign. Like this: 2x - 4 Equals 2.Any equation's general form includes the degree of variables in descending order. A linear equation has the general form an x + b = 0.To learn more about equations refer to
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12feet 4ft what’s the pitch
The area of the football pitch can be found to be 48 ft ²
How to find the area ?The area of the scaled model of the football pitch can be found by using the formula for the area of a rectangle . This is because the scaled model of the pitch takes the form of a rectangle .
The area would therefore be :
= Length x Width
Length = 12 ft
Width = 4 ft
Area of the football pitch model is ;
= 12 x 4
= 48 ft ²
In conclusion, the area of the pitch is 48 ft ² .
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The full question is:
A scaled model of a football pitch measures 12 feet 4 ft. What's the pitch area?
Use a right triangle to write the following expression as an algebraic expression. Assume that x is positive and that the given inverse trigonometric function is defined for the expression in X. cos (sin - 15x) Identify the right triangle that can be used to simplify the given expression. Choose the correct answer below.
The expression cos (sin - 15x) is a composition of two trigonometric functions, cosine and sine. To simplify this expression, we can use the identity cos (a - b) = cos a cos b + sin a sin b.
To use this identity, we need to identify a right triangle that relates the two trigonometric functions in the expression. One such triangle is the one that relates the sine and cosine functions, known as the "sine-cosine triangle".
This triangle relates the sine and cosine functions through the following identities:
sin a = y/r
cos a = x/r
Where a is the angle opposite to the side of length y, x is the side opposite to angle a and r is the hypotenuse of the triangle.
We can use these identities to write the given expression as:
cos (sin - 15x) = cos (y/r - 15x) = cos y/r cos(-15x) - sin y/r sin(-15x)
This is by using the identity cos (a-b) = cos a cos b - sin a sin b
The expression cos (sin - 15x) can be written as cos y/r cos(-15x) - sin y/r sin(-15x)
It's important to note that this simplified expression is still not in its final form as we have no information about the value of y and r, this is only possible if we have a specific angle or triangle that we are working with.
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Jay Gatsby categorizes wines into one of three clusters. The centroids of these clusters, describing the average characteristics of a wine in each cluster, are listed in the following table. 1 2 8 Characteristic Cluster 2 3 7 Magnesium Flavanoids Proanthocyanins Colorintensity
Cluster 1 has average magnesium, flavanoids, and proanthocyanins levels, while Cluster 2 has low levels of these compounds, and Cluster 3 has high levels of these compounds. Colorintensity levels vary across clusters.
Cluster 1 has an average level of magnesium, flavanoids, and proanthocyanins. This means that the levels of these compounds are not particularly high or low. Cluster 2 has a lower level of these compounds than Cluster 1, so wines in this cluster would have a milder taste than Cluster 1. Cluster 3 has a higher level of these compounds than Cluster 1, resulting in a more intense flavor. The colorintensity of wines in each cluster can also vary, with darker or lighter wines depending on the cluster. Gatsby’s categorization system is based on these average characteristics, allowing him to determine the flavor and color of wines in each cluster.
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what percent of 125 is 250?
what percent of 45 is 9?
what percent of 250 is 100?
what percent of300 is 75?
1) 250÷125=2×100=200%
2) 9÷45= 0.2×100= 20%
3) 100÷250=0.4×100=40%
4) 75÷300=0.214×100=21.4%
For a nonnegative real number x > 0, let {x} denote its fractional part. For instance, {1.2345} = 0.2345, {n} = 0.14159..., {} = 0.4, and so on.
The domain and the range of an exponential parent function mean that the domain is all real numbers and the range signifies positive real numbers y > 0.
What is an exponential parent function?
The simplest parent function of an exponential function takes the form:
f(x)= p ^x , where p refers to the base.
So, if we have a number such that x = 3 and the base is 2
f(3) = 2³
f(3) = 6
Therefore, we can conclude that the domain of an exponential parent function is all real numbers, and the range is positive real numbers (y > 0).
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Directions: Solve for x. Round to the nearest tenth.
Answer:
x = 73
Step-by-step explanation:
Since it's asking for the angle it's going to be inverse (sin-1,cos-1,tan-1)
It only gives you the opposite side and the hypotenuse
You can find the opposite side by going opposite from the missing angle like basically the side that is not being touched by x (The 4) This is the opposite angle
The hypotenuse is always going to be the long angle that is on the opposite side of the right angle (The 6) This is the hypotenuse
The adjacent side is the side not opposite to the x
Remember the acronym SOH CAH TOA
sin-opposite/hypotenuse
cos-adjacent/hypotenuse
tan-opposite/adjacent
The opposite and hypotenuse are the only sides that gave a number so it is sin and is inverse
[tex]sin^{-1} (\frac{4}{6} ) = .729[/tex]
hope this helps
so confused
DUE SOON PLEASE HELP IM SO CONFUSED
Answer:
1) Mean = $75812.50
Median = $74000
Mode = $73100
2) Mean = 24.5
Median = 24.33333...
Modal class = 29 - 33
Step-by-step explanation:
Definitions
The mode is the most frequently occurring data value.The median is the middle value when all data values are placed in order of size.The mean is the sum of all data values divided by the total number of data values.Question 1Given data:
71500, 74900, 69700, 82300, 78500, 73100, 73100, 83400Mean
[tex]\begin{aligned}\textsf{Mean}&=\dfrac{71500+74900+69700+82300+78500+73100+73100+83400}{8}\\ &= \dfrac{606500}{8}\\&=75812.50\end{aligned}[/tex]
Median
Place the data values in order of size (smallest to largest):
69700, 71500, 73100, 73100, 74900, 78500, 82300, 83400As there is an even number of data values, the median is the mean of the middle two values:
[tex]\implies \sf Median=\dfrac{73100+74900}{2}=74000[/tex]
Mode
The most frequently occurring data value is $73100. Therefore:
[tex]\implies \textsf{Mode} = 73100[/tex]
Question 2With grouped data, we can only estimate the mean and median.
Mean
To find an estimate of the mean, assume that every reading in a class takes the value of the class midpoint.
The number of days is the frequency (f).
Add a class midpoint (x) and an fx column to the table:
[tex]\begin{array}{|c|c|c|c|}\cline{1-4}\vphantom{\dfrac12} \sf Number\;of\;sales&\textsf{Number of days, $f$}&\textsf{Class midpoint, $x$}&fx\\\cline{1-4}\vphantom{\dfrac12}14-18&5&16&80\\\cline{1-4}\vphantom{\dfrac12}19-23&9&21&189\\\cline{1-4}\vphantom{\dfrac12}24-28&6&26&156\\\cline{1-4}\vphantom{\dfrac12}29-33&10&31&310\\\cline{1-4}\vphantom{\dfrac12}\sf Totals&\sum f=30&&\sum fx=735\\\cline{1-4}\end{array}[/tex]
[tex]\textsf{Mean}=\dfrac{\sum fx}{\sum f}=\dfrac{735}{30}=24.5[/tex]
Median
To find an estimate for the median, use linear interpolation.
Add a cumulative frequency column to the table:
[tex]\begin{array}{|c|c|c|}\cline{1-3}\vphantom{\dfrac12} \sf Number\;of\;sales&\textsf{Number of days}&\textsf{Culmulative frequency}\\\cline{1-3}\vphantom{\dfrac12}14-18&5&5\\\cline{1-3}\vphantom{\dfrac12}19-23&9&14\\\cline{1-3}\vphantom{\dfrac12}24-28&6&20\\\cline{1-3}\vphantom{\dfrac12}29-33&10&30\\\cline{1-3}\end{array}[/tex]
Find which class the median is in.
Since n/2 = 30/2 = 15, there are 15 values less than or equal to the median. This means the median must be in the 24-28 class.
Therefore:
[tex]a_1=m-23.5[/tex][tex]b_1=28.5-23.5=5[/tex][tex]a_2=15-14=1[/tex][tex]b_2=20-14=6[/tex]To find the median, m:
[tex]\begin{aligned}\dfrac{a_1}{b_1}=\dfrac{a_2}{b_2} \implies \dfrac{m-23.5}{5}&=\dfrac{1}{6}\\\\ 6(m-23.5)&=5\\\\6m-141&=5\\\\6m&=146\\\\m&=24.3333...\end{aligned}[/tex]
Therefore, the median is 24.3333...
Mode
The modal class is the class with the highest frequency density.
As all the classes are the same width, this is the class with the highest frequency.
Modal class = 29 - 33The wind chill Index W is the perceived temperature when the actual temperature is T and the wind speed is v, so we can write W = f(T, v)
Estimating : Ft( -15,40 ) = ( 1.2 + 1.4 ) / 2 = 1.30⁰c
when the actual temperature is -15⁰c and the wind speed is 40 km/h the apparent temperatures increase by 1.3⁰c that the actual temperature rises
estimating: Fv ( -15,40 ) = (-0.2 + -0.1 ) / 2 = -0.15⁰c
when the actual temperature -15⁰c and the wind speed is 40 km/h the apparent temperature decreases by 0.15⁰c for every km/h that the wind speed
A) Estimating the values of Ft(−15, 40) and fv(−15, 40)
To estimate the value of Ft( -15,40 ) we have to take an average value hence Ft ( -15,40 ) = ( 1.2 + 1.4 ) / 2 = 1.30
and this means that when the actual temperature is -15⁰c and the wind speed is 40 km/h the apparent temperatures increase by 1.3⁰c that the actual temperature rises
To estimate the value of Fv(-15,40 ) we have to take an average value
hence Fv ( -15,40 ) = (-0.2 + -0.1 ) / 2 = -0.15
and this means that when the actual temperature -15⁰c and the wind speed is 40 km/h the apparent temperature decreases by about 0.15⁰c for every km/h that the wind speed.
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The complete question is :
The wind-chill index W is the perceived temperature when the actual temperature is T and the wind speed is v, so we can write W = f(T, v). (a) Estimate the values of fT(−15, 40) and fv(−15, 40). (Round your answers to two decimal places.) fT(−15, 40) ≈ fv(−15, 40) ≈ What are the practical interpretations of these values? When the actual temperature is −15°C and the wind speed is 40 km/h, the apparent temperature ---Select--- by about °C for every degree that the actual temperature rises. When the actual temperature is −15°C and the wind speed is 40 km/h, the apparent temperature.
It takes Johnny 42 minutes to get to the zoo.After 18 minutes he stopped to get gas for his car .Write an equation to express how many more minutes he had to travel after getting gas
The equation to express how many more minutes he had to travel after getting gas is 42 - 18 = x.
What are the relation between time, distance, and speed?
The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in meters (m) and time is in seconds (s), so the units will be in meters per second (m/s).
The equation to express how many more minutes Johnny had to travel after getting gas is:
42 - 18 = x
Johnny's total travel time to the zoo is 42 minutes
He stopped for 18 minutes to get gas for his car
To find out how many more minutes he had to travel after getting gas, we need to subtract the 18 minutes he spent getting gas from his total travel time.
This is represented by the equation 42 - 18 = x, where x represents the number of minutes he had left to travel after getting gas.
Hence, The equation to express how many more minutes he had to travel after getting gas is 42 - 18 = x.
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There were seven serving lines at the
annual pancake breakfast. The total
number of people served at each of
the seven lines were 126, 118, 127, 134,
98, 132, and 121. What was the median
number of people served?
Find the volume of a square based pyramid with a base length of 7 and a height of 12
Answer:
V=a2h3
Step-by-step explanation:
HELP ASAP! FIND LINEAR EQUATION PARALLEL TO Y = -3/4X + 1 THROUGH POINTS (8,-6)
The equation of the line parallel to y = (-3/4)x + 1 and passing through (8, 6) is y = (-3/4)x
What is an equation?An equation is an expression showing the relationship between numbers and variables.
The slope intercept form of a straight line is:
y = mx + b
Where m is the slope and b is the y intercept.
Two lines are parallel if they have the same slope.
Given the line y = (-3/4)x + 1, the slope is -3/4. The line parallel to y = (-3/4)x + 1 would have same slope of -3/4.
The parallel line passes through (8, -6), hence:
y - y₁ = m(x - x₁)
y - (-6) = (-3/4)(x - 8)
y + 6 = (-3/4)x + 6
y = (-3/4)x
The equation of the line is y = (-3/4)x
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the principal of a large high school is concerned about the number of absences for students in his school to investigate friends list showing the numbers of absences during the last month of each of the 250
The shape of the sampling distribution of the sample mean is approximately normal because the sample size is greater than 3.
Why do we use sampling distribution?The sampling distribution is the probability distribution of a statistic obtained from a larger sample size drawn from a particular population. The sampling distribution of a certain population is the frequency distribution of a set of possible outcomes for a population statistic.The sampling distribution is the probability distribution of a statistic that is created by drawing several samples from a certain population. Researchers use sample distributions to simplify the statistical inference process.The sampling distribution of a proportion is obtained by repeating your survey or poll for each possible sample of the population. For instance, instead of asking 1,000 cat owners what cat food they like, you could conduct a number of surveys.Given data :
a ) Approximately normal because the sample size is greater than 3.
b ) b ) ux = 1.1 and Jx = = 0.198
c ) c ) P ( ux ∠ 1 ) = normal cdf ( lower : 1000, upper : 1, u : 1.1 , J : 0.198 ) = 0.3068
d ) The principal could pick 50 students may times and find the median and repeat several times until he has every possible sampling distribution.
Completed question :
The principal of a large high school is concerned about the number of absences for students at his school. to investigate, he prints a list showing the number of absences during the last month for each of the 2500 students at the school. for this population of students, the distribution of absences last month is skewed to the right with a mean of 1.1 and a standard deviation of (1.4). suppose that a random sample of 50 students is selected from the list printed by the principal and the sample mean number of absences is calculated.
a.) What is the shape of the sampling distribution of the sample mean? Explain
b.) What are the mean and standard deviation of the sampling distribution of the sampling mean?
c.) What is the probability that the mean number of absences in a random sample of 50 students is less than 1?
d.) Because the population distribution is skewed, the principal is considering using the median number of absences last month instead of the mean number of absences to summarize the distribution. Describe how the principal could use a simulation to estimate the standard deviation of the sampling distribution of the sample median for random samples of size 50.
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The perimeter of the shape is 51.42 cm
Calculate the value of the diameter d.
Take to be 3.142
TU
Answer:
The perimeter of a circle is equal 2 * pi * radius. So, if we let "d" be the diameter of the circle, we can use the following to solve for the radius:
Perimeter = 2 *p * radius = 51.42 cm
we can then use the relationship between the diameter and the radius to solve for the diameter:
d = 2 * radius
substitute the value of the perimeter equation into the diameter equation:
d= 2 * (51.42 cm / 2 * 3.142)
d= 33.49 cm
therefore, the diameter d is 33.49 cm
Unit 3 Cumulative Assessment
What is the height, x, in the triangle below?
5
X
O A 2√5
OB. 5
O C. 5√2
OD. 10
10
The height, x, in the triangle is 0 units.
What to find perpendicular distance?
Perpendicular distance is a measure of the distance between a point and a line. It is the shortest distance between the point and the line, and it is always perpendicular to the line. The perpendicular distance is also known as the "altitude" or "height" in geometry.
In the triangle, the side OB is 5 units and the side OC is 5√2 units. The height, x, is the perpendicular distance from the vertex O to the line segment OB.
Using the Pythagorean theorem, we can find the value of x:
x^2 + (5)^2 = (5√2)^2
x^2 = (5√2)^2 - (5)^2
x^2 = 25 - 25
x^2 = 0
x = 0
Therefore, the height, x, in the triangle is 0 units.
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Heather , deon and trey sent a total of 109 text messages over their cell phones during the weekend. Trey sent 3 times as many messages as deon. Deon sent 9 fewer messages than heather . How many messages did they each send
Answer:
Deon sent 20 messages
Trey sent 60 messages
Heather sent 29 messages
Step-by-step explanation:
Explanation above
A man cover 255 km in 6 hours on scooter at a uniform speed find his speed in kilometres per hour
Answer:
The man's speed is 42.5 km/h.
You can find this by dividing the distance he traveled (255 km) by the time it took him to travel that distance (6 hours).
255 km / 6 hours = 42.5 km/h.
The formula to find speed is:
Speed = Distance / Time
In this case, the distance is 255 km and the time is 6 hours. So using the formula, we can calculate the speed as:
Speed = 255 km / 6 hours = 42.5 km/h
So the man's speed is 42.5 km/h.
Please help!! :)
In the figure, GH = HI = IJ. Find each length.
Find the area of the figure.
Answer:
A = 30 yd²
Step-by-step explanation:
the figure is a trapezium whose area (A) is calculated as
A = [tex]\frac{1}{2}[/tex] h (b₁ + b₂)
where h is the perpendicular height between bases b₁ and b₂
here h = 5 , b₁ = 8 , b₂ = 4 , then
A = [tex]\frac{1}{2}[/tex] × 5 × (8 + 4) = 2.5 × 12 = 30 yd²
Solve and graph. --6x < 21
[tex]-6x < 21[/tex]
Divide both sides by -6:
[tex]\dfrac{-6x}{-6} < \dfrac{21}{-6}[/tex]
[tex]x > -\dfrac{7}{2}[/tex], [tex]x > -3.5[/tex]
given a list of clothing items [a, b, c, ...] and a list of illegal outfits [[a, b], [a, c], ...], return the number of legal outfit combinations. a combination has to have at least 1 outfit and must not contain any illegal combination.
The objective of backtracking, an algorithmic methodology, is to find every possible solution to a problem by applying the "brute force" method.
What is backtracking used for?
Crosswords, verbal arithmetic, Sudoku, and many other puzzles that need constraint fulfilment may all be solved using backtracking. For parsing, the knapsack problem, and other combinatorial optimization issues, it is frequently the most practical method.
The objective of backtracking, an algorithmic methodology, is to find every possible solution to a problem by applying the "brute force" method. It entails gradually compiling a collection of each answer. A issue would have limits, so any solutions that don't meet them would be eliminated
.
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Determine whether the quantitative variable is discrete or continuous. the low temperature in degrees Fahrenheit on January 1st in Cheyenne, Wyoming discrete continuous
Whether a discrete or continuous quantity is used. the lowest temperature recorded on January 1st in Cheyenne, Wyoming, in degrees Fahrenheit
What is meant by Fahrenheit temperature?The Fahrenheit temperature scale divides the distance between the freezing point of water, 32°, and the boiling point of water, 212°, into 180 equal parts. Add 32 and multiply by.5556 (or 5/9) to convert temperatures from degrees Fahrenheit to degrees Celsius. Add 32 and multiply by 1.8 (or 9/5) to convert temperatures from degrees Celsius to Fahrenheit.The temperature is measured in Fahrenheit (°F) in the US. 30 degrees Fahrenheit is extremely cold, whereas 100 degrees is extremely hot. A really cold day is indicated by the left thermometer.What makes America utilise Fahrenheit. Fahrenheit had made significant progress in the 18 years it had been as the only temperature scale.To learn more about Fahrenheit, refer to:
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: find the point on a directed line segment between two given points that partitions the segment in a given ratio.
The point that partitions the line in the ratio of 1:3 is (1.333, 3.333).
Given two points P1(x1,y1) and P2(x2,y2), the point that partitions the directed line between these two points in a given ratio r can be calculated using the following formula:
P(x,y) = (x1 + r(x2-x1), y1 + r(y2-y1))
For example, if we have P1(1,2) and P2(4,6) and we want to partition the line in a ratio of 1:3, the point P(x,y) can be calculated as follows:
P(x,y) = (1 + 1/3(4-1), 2 + 1/3(6-2)) = (1.333,3.333)
Therefore, the point that partitions the line in the ratio of 1:3 is (1.333, 3.333).
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Popcorn at a concession stand comes in two different-sized containers. The dimensions of the small container with a diameter of 4 in. are shown below.
A popcorn container shaped like a cylinder is shown. A dashed line across the top of the container is labeled four inches. The height of the container is labeled four and five tenths inches.
The large container of popcorn has the same height as the small container, but its diameter is 1.5 times greater. How do the volumes of the two containers of popcorn compare? Use 3.14 for π.
Select the answers from the drop-down lists to correctly complete each sentence.
The volume of the large container of popcorn is _______ in.^3
OPTIONS FOR BLANK :
A) 56.52
B) 84.78
C)127.17
D) 169.56
This is ______ times the volume of the small container.
OPTIONS FOR THIS BLANK :
A) 2.88
B) 2.25
C) 1.8
D) 1.5
The volume of the large container of popcorn is 56.52 in³
This is 2.25 times the volume of the small container.
How to determine how the volumes of the two containers of popcorn compare?The volume of a cylinder is given by the formula:
V = πr²h
where r and h represent the radius and height respectively
Volume of small container = 3.14 × 2² × 4.5 = 56.52 in³
For large container:
diameter = 1.5 × 4 = 6 in and radius = 3 in
Volume of large container = 3.14 × 3² × 4.5 = 127.17 in³
Volume of large container/Volume of small container = 127.17/56.52 = 2.25
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SOLVE BY INDIRECT PROOF 1. If n – m is even, then n^2 – m^2 is also an even.2. If x is odd positive integer then x^2 – 1 is divisible by 4. 3. If x is an odd integer, then 8 is a factor of x^2 – 1. 4. Suppose x, y E Z. If x is even, then xy is even.
All statements can be proven by indirect proof. If the assumptions of the statement are false, the resulting contradiction proves that the initial assumption is wrong and the statement is true.
1. To prove this statement by indirect proof, assume that n – m is an even number but n^2 – m^2 is an odd number. Since n – m is even, it can be written as n – m = 2k, where k is an integer. This can be substituted into n^2 – m^2 = n^2 – (2k+m)^2 to create n^2 – m^2 = n^2 – 4km – m^2. Since both n and m are integers, 4km is an even number. This means that n^2 – m^2 is an even number, contradicting our assumption that it is an odd number. Therefore, our initial assumption is wrong, and n^2 – m^2 must be an even number if n – m is even.
2. To prove this statement by indirect proof, assume that x is an odd positive integer but x^2 – 1 is not divisible by 4. Since x is an odd positive integer, it can be written as x = 2k + 1, where k is an integer. This can be substituted into x^2 – 1 = (2k + 1)^2 – 1 to create x^2 – 1 = 4k^2 + 4k. Since both k and 4 are integers, 4k^2 is an even number. This means that x^2 – 1 is divisible by 4, contradicting our assumption that it is not divisible by 4. Therefore, our initial assumption is wrong, and x^2 – 1 must be divisible by 4 if x is an odd positive integer.
3. To prove this statement by indirect proof, assume that x is an odd integer but 8 is not a factor of x^2 – 1. Since x is an odd integer, it can be written as x = 2k + 1, where k is an integer. This can be substituted into x^2 – 1 = (2k + 1)^2 – 1 to create x^2 – 1 = 4k^2 + 4k. Since 8 is a factor of 4k^2, it is also a factor of x^2 – 1. This means that 8 is a factor of x^2 – 1, contradicting our assumption that it is not a factor of x^2 – 1. Therefore, our initial assumption is wrong, and 8 must be a factor of x^2 – 1 if x is an odd integer.
4. To prove this statement by indirect proof, assume that x is an even integer but xy is an odd number. Since x is an even integer, it can be written as x = 2k, where k is an integer. This can be substituted into xy = (2k)y to create xy = 2ky. Since both k and y are integers, 2ky is an even number. This means that xy is an even number, contradicting our assumption that it is an odd number. Therefore, our initial assumption is wrong, and xy must be an even number if x is an even integer.
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ana lopez borrow $5000 for 75 days at 8% exact interest find how much interest she must pay on the loan and how much will be die at maturity?
To find the interest Ana must pay on the loan, we can use the formula:
Interest = Principal x Interest Rate x Time (in days) / 365
What's the math rate?
A rate is a unique ratio where the two words are expressed in several units. For instance, the price is 69 for 12 ounces if a 12-ounce can of maize costs 69. This is not a proportion of two comparable units, like shirts. Cents and ounces are the two dissimilar units in this ratio.
In this case:
Interest = $5000 x 8% x 75 / 365 = $200
So, Ana must pay $200 in interest on the loan.
To find the total amount due at maturity, we add the interest to the principal:
Total Due = Principal + Interest = $5000 + $200 = $5200
So, Ana will need to pay $5200 at maturity.
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