The probability that at least 20 of the novels have fewer than 400 pages is 1 - 0.2266 = 0.7734 or 77.34%.
What is the normal distribution and the cumulative distribution?
The normal distribution, also known as the Gaussian distribution or bell curve, is a probability distribution that describes the distribution of a continuous random variable.
The cumulative distribution function (CDF) is a function that gives the probability that a random variable is less than or equal to a certain value
To solve this problem, we can use the normal distribution and the cumulative distribution function (CDF) of a normal distribution. The normal distribution is a probability distribution that describes how many novels have a certain number of pages.
The mean number of pages in a novel is given as 525 and the standard deviation is 200. We know that 30% of the novels have fewer than 400 pages, which corresponds to a z-score of (400 - 525) / 200 = -0.75.
We can use the cumulative distribution function (CDF) to find the probability that at least 20 of the novels have fewer than 400 pages. The CDF of a normal distribution gives the probability that a random variable is less than or equal to a certain value.
The probability that at least 20 of the novels have fewer than 400 pages is the same as the probability that at most 30 of the novels have more than 400 pages. Using a standard normal table or software, we can find the probability that a standard normal random variable is less than -0.75 as P(X< -0.75) = 0.2266, this is the probability that less than 30 novels have more than 400 pages.
Hence, the probability that at least 20 of the novels have fewer than 400 pages is 1 - 0.2266 = 0.7734 or 77.34%.
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A radio station plays tree commercials between two songs. The commercials play for two minutes altogether. The first commercial is 1/2 minute and the second commercial is 1 1/4 minutes how long is the third commercial
through: (-2, 3), slope = -1
Slope is y is -1x + 1.
Find slope?To enter data and find the equation's solution, we can utilize the equation's point-slope form.
use the point ( 2, 3) and the slope of 1.
m \s= \s− \s1
x \s1 \s= \s− \s2
y \s1 \s= \s3
In the point-slope formula,
y \s− \sy \s1 \s= \sm \s( \sx \s− \sx \s1 \s)
the values into the plug
y \s− \s3 \s= \s− \s1 \s( \sx \s− \s( \s− \s2 \s) \s)
symbol reduction
Distribute the 1 according to y 3 = 1 (x + 2).
Use additive inverse to find the y in the equation y = 3 = 1 x 2
y \s− \s3 \s+ \s3 \s= \s− \s1 \sx \s− \s2 \s+ \s3
simplify
y \s= \s− \s1 \sx \s+ \s1.
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If the circulation for newspaper 1 is 386 thousand more than the circulation for newspaper 2, and their combined circulation is 2514 thousand, find the circulation for each newspaper.
A 6-sided die is rolled 2 times. What is the probability of getting 1 both times? (Give your answer as a fraction in simplest form.
The probability of rolling two ones in a row is equal to P = 1/36
How to find the probability?
We want to find the probability of rolling two ones in a row.
Remember that a dice has 6 sides, so the probability of randomly rolling a 1 is just:
p = 1/6
And if we want to do that two times then we need to have that probability twice:
q = 1/6
And the joint probability (probability of rolling two ones) is equal to the product between the individual ones:
P = p*q = (1/6)*(1/6)
P = 1/36
That is the probability.
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How do you solve a triangle ABC where b=125 c=162 B=40 degrees?
Answer:
Angle A = 83.59° (2 d.p.)
Angle C = 56.41° (2 d.p.)
Side a = 193.25 (2 d.p.)
Step-by-step explanation:
[tex]\boxed{\begin{minipage}{7.6 cm}\underline{Sine Rule} \\\\$\dfrac{\sin A}{a}=\dfrac{\sin B}{b}=\dfrac{\sin C}{c} $\\\\\\where:\\ \phantom{ww}$\bullet$ $A, B$ and $C$ are the angles. \\ \phantom{ww}$\bullet$ $a, b$ and $c$ are the sides opposite the angles.\\\end{minipage}}[/tex]
Given:
b = 125c = 162B = 40°Substitute the given values into the Sine Rule formula:
[tex]\implies \dfrac{\sin A}{a}=\dfrac{\sin 40^{\circ}}{125}=\dfrac{\sin C}{162}[/tex]
Solve for angle C:
[tex]\implies \dfrac{\sin 40^{\circ}}{125}=\dfrac{\sin C}{162}[/tex]
[tex]\implies \sin C=\dfrac{162\sin 40^{\circ}}{125}[/tex]
[tex]\implies C=\sin^{-1}\left(\dfrac{162\sin 40^{\circ}}{125}\right)[/tex]
[tex]\implies C=56.4136175...^{\circ}[/tex]
Interior angles of a triangle sum to 180°. Therefore:
[tex]\implies A+B+C = 180^{\circ}[/tex]
[tex]\implies A = 180^{\circ}-B-C[/tex]
[tex]\implies A = 180^{\circ}-40^{\circ}-56.4136175...^{\circ}[/tex]
[tex]\implies A = 83.5863824...^{\circ}[/tex]
Finally, to find a, substitute the found angles and sides into the Sine Rule and solve for a:
[tex]\implies \dfrac{\sin A}{a}=\dfrac{\sin B}{b}[/tex]
[tex]\implies \dfrac{\sin 83.5863824...^{\circ}}{a}=\dfrac{\sin 40^{\circ}}{125}[/tex]
[tex]\implies a=\dfrac{125\sin 83.5863824...^{\circ}}{\sin 40^{\circ}}[/tex]
[tex]\implies a=193.248396...[/tex]
tracy noticed that the serving size for a boxed meal is 1.5 cups and each contains 148 milligrams stacy used the entire box to make 6 cups of food. How many milligrams are in the meal tracy prepared
Answer:
5.92
Step-by-step explanation:
Set up a proportion
cups/mg = cups/mg
[tex]\frac{1.5}{148}[/tex] = [tex]\frac{6}{x}[/tex]
1.5 x 4 = 6,
so 1.48 x 4 = 5.92
dividend in arrears means that
Answer: Since the company is running short of cash they have failed or late to pay the shareholders' share of the profit which is the dividend.
-25 POINTS-
Y=[?]x+[?]
Don’t need to explain. Guessers will be reported.
The linear equation in two variables is -5X + 10 = Y
What is linear equation?A linear equation in mathematics is an equation that may be written as follows: Y = aX + b where a and b are the coefficients, which are frequently real numbers, and X and Y are the variables (or unknowns). As long as they don't contain any of the variables, the coefficients can be thought of as equation parameters and can be arbitrary expressions. The coefficients must not all be 0 in order to produce a meaningful linear equation.
A linear polynomial over a field, from which the coefficients are taken, can also be equalised to zero to produce a linear equation.
Such an equation's solutions are the values that, when used as placeholders for the unknowns, result in the equality being true.
Let us assume that given equation as linear equation in two variables
Y = aX + b
Also, from the given table, the value which satisfy the equations are
X =3, Y = -5 and X = 4, Y = -10
using these values we have
-5 = 3a +b and -10 = 4a +b
subtracting both the equations we get,
-5 = a
Now putting this value in an equation we get
b = 10
so the general equation is -5X + 10 = Y
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What is the answer for this equation -9b+2n-4+2b
Answer: Add −9b and 2b. −7b + 2n −4
The radioactive substance cesium-137 has a half-life of 30 years. The amount A (t) (in grams) of a sample of cesium-137 remaining after t years is given by the
following exponential function.
- 647 (12)
A (t) = 64
30
Find the initial amount in the sample and the amount remaining after 100 years.
Round your answers to the nearest gram
?
To get the initial mass, set t = 0.
A(0) = 621 (1/2)0/30 g = 621 (1) g = 621 g
To get the mass after 100 years, just plug t = 100 into A(t) and evaluate.
A(100) = 621 (1/2)100/30 g = ? g
What is mass?Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force. The unit of mass in the International System of Units (SI) is the kilogram, which is defined in terms of Planck’s constant, which is defined as equal to 6.62607015 × 10−34 joule second. One joule is equal to one kilogram times metre squared per second squared. With the second and the metre already defined in terms of other physical constants, the kilogram is determined by accurate measurements of Planck’s constant.To learn more about International System of Units (SI) refer to:
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Suppose that the matrix A has the following eigenvalues and eigenvectors: λ1 = 3 + I with v1 = [ -1 1 -4]Andλ2 = 3 + i with v2 = [ -1 1 + 4i] Write the solution to the linear system r = Ar in the following forms. A. In eigenvalue/eigenvector form: B. In fundamental matrix form: C. As two equations: (write c1 and c2 for c1 and c2)
A) r(t) =[tex]c_{1}[/tex]×e^(∧×t)[tex]v_{1}[/tex]+ [tex]c_{2}[/tex] × e^(∧²×t)[tex]v_2[/tex] ; B) r(t) = X×e^(∧×t)c ; C) [tex]r_1[/tex](t) = [tex]c_{1}[/tex](-1×[tex]e^{3t}[/tex])×cos(t) -1×[tex]e^{3t}[/tex]×sin(t) -4×[tex]e^{3t}[/tex], [tex]r_2[/tex](t) = [tex]c_2[/tex](-1×[tex]e^{3t}[/tex]×cos(t) -1×[tex]e^{3t}[/tex]×sin(t) + 4i×[tex]e^{3t}[/tex].
A) The solution to the linear equation in eigenvalue/eigenvector form:
r(t) = [tex]c_{1}[/tex]×e^(∧×t)[tex]v_{1}[/tex]+ [tex]c_{2}[/tex] × e^(∧²×t)[tex]v_2[/tex]
B) The solution to the linear equation in fundamental matrix form:
r(t) = X×e^(∧×t)c
C) As two equations: The solution to the linear system can also be written as two equations as follows:
[tex]r_1[/tex](t) = [tex]c_1[/tex] ×e^(∧²×t)[tex]v_1[/tex] = [tex]c_{1}[/tex](-1×[tex]e^{3t}[/tex])×cos(t) -1×[tex]e^{3t}[/tex]×sin(t) -4×[tex]e^{3t}[/tex]
[tex]r_2[/tex](t) = [tex]c_2[/tex]×e^(∧² ×t)[tex]v_2[/tex] = [tex]c_2[/tex](-1×[tex]e^{3t}[/tex]×cos(t) -1×[tex]e^{3t}[/tex]×sin(t) + 4i×[tex]e^{3t}[/tex]
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What common fraction is halfway between 1/8 and 1/10 on a number line?
Answer: 9/80
Step-by-step explanation:
1/8 = 10/80
1/10 = 8/80
9/80 is fraction between 1/8 and 1/10
Have A Good Day :)
Tom wishes to purchase a property that has been valued at $300,000. He has $30,000 available as a deposit, and will require a mortgage for the remaining amount. The bank offers him a 25-year mortgage at 2% interest. Calculate his monthly repayments.
Tom's monthly mortgage repayment will be an amount of $1,144.41.
To calculate Tom's monthly mortgage repayment, we can use the formula:
[tex]M = P [ i(1 + i)^n ] / [ (1 + i)^n -1 ][/tex]
Where:
M = monthly repayment
P = the principal amount (loan amount) = $300,000 - $30,000 = $270,000
i = monthly interest rate = 2%/12 = 0.02/12 = 0.0017
n = number of months = 25 years x 12 months/year = 300 months
Plugging in the values:
M = $270,000 [ 0.0017(1 + 0.0017)³⁰⁰ ] / [ (1 + 0.0017)³⁰⁰ – 1 ]
M = $1,144.41
Thus, his monthly mortgage repayment will be $1,144.41.
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How to answer this one?
Answer:
this is a little typical
Each marble bag sold by Dante's Marble Company contains red marbles for every orange marbles. If a bag has orange marbles, how many red marbles does it contain?
If a bag has orange marbles, the number of red marbles it will contain would be also the same as the number of orange marbles.
How to derive the number of marbles?The Dante's Marble Company sells bags of marbles that contains different types of marbles such as both the red and the orange marbles I'm a particular order.
In a bag of marbles, every red marbles = every orange marbles.
Therefore the number of red marbles found in a bag will be the same amount of orange marbles found in the same bag.
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what is the volume of the figure below, which is composed of two cubes with side lengths of 5 units?
Answer:
250u2
Step-by-step explanation:
The volume of a cube is found by multiplying LxWxH. 5x5x5-125, 125x2-250
Hope this helped :)
find a set r of representatives such that every power of x is equal to exactly one element of r (and prove it.)
Consequently, x∈R denotes that x belongs to the set of Real numbers. This means that x is a real number.
What is meant by Real numbers?Any number that can be used to quantify a continuous, one-dimensional quantity, such as time, temperature, or distance, is referred to as a real number. Continuous in this context suggests that values may vary by arbitrary little amounts.An endless decimal expansion allows for a nearly universal representation of every real number. Rational numbers like positive and negative integers, fractions, and irrational numbers are all examples of real numbers. In other words, every number we can come up with aside from complicated numbers is a real number. Examples of real numbers include 3, 0, 1.5, 3/2, √5, and so forth.Real numbers are all entire numbers. Irrational numbers are integers. Natural numbers are numbers that make sense.Hence, As a result, the symbol x∈R indicates that x is a member of the Real number set. Thus, x must be a real number.
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Which interval can be used to construct the inverse of f(x)?
Answer:
pie/8, 3pie/8
Or
B
What is the positive solution to this equation?
2x2+13x=57
your solution
4+13x=57
x=53÷4 = 13.25
Chang has two coupons for. A printer coupon a has 14$ rebate on a 75$ printer
Coupon b has 15%off of a 75 $ printer choose the coupon that gives the lower prize
Answer:
The coupon that gives $14 rebate off $75 gives a lower price
Step-by-step explanation:
Let's figure out what percentage of $75 the $14 rebate coupon is
If this percentage is greater than 15% then the $14 rebate coupon gives a better discount; if not the 15% discount offers a better buy
To find what % $14 is of the $75 cost of printer, divide 14 by 75 and multiply by 100 to convert to %:
[tex]\dfrac{14}{75} \times 100 = 18.67\%\\\\[/tex]
Since 18.67% is greater than 15%, getting $14 off $75 will give a lower price
9x+7y=4 solve for y.
Find the class width for this histogram.
The class width of the histogram is 5
What is histogram?A histogram is a visual representation of statistical data that makes use of rectangles to illustrate the frequency of data points over a range of successive numerical intervals of equal width called the class width.
The independent variable and dependent variable are plotted along the horizontal axis and the vertical axis, respectively, in the most common type of histogram.
The class width is plotted in the x - direction. this is the difference between the two consecutive values in the boundary.
class width = 100.5 - 95.5 = 5
class width = 85.5 - 80.5 = 5
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A moving object travels 350 feet in 5 seconds assuming that the object travels at a constant speed , When dropped from a height of 350 feet , It takes exactly 5 seconds for the stone to hit the ground
The speed when the object and dropped from a height of 350 feet and takes exactly 5 seconds is 70 feet per seconds.
How to calculate the speed?Speed is the rate at which an object's location changes in a particular direction. The distance traveled on relation changes to a particular direction. The distance in relation to the time it took to travel the distance is the speed. It's a scalar quantity
In this situation, when dropped from a height of 350 feet, it takes exactly 5 seconds for the stone to hit the ground.
The speed will be:
= Distance / Time
= 350 / 5
= 70 feet per seconds
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Complete question
A moving object travels 350 feet in 5 seconds assuming that the object travels at a constant speed , When dropped from a height of 350 feet , It takes exactly 5 seconds for the stone to hit the ground. Calculate the speed.
The first three terms of a sequence are given. Round to the nearest thousandth (if necessary).
2, 6, 10,..
Find the 41st term.
The given sequence appears to be an arithmetic sequence, as the common difference between consecutive terms is 4.
The nth term of an arithmetic sequence is given by the formula: a_n = a_1 + (n-1)d, where a_1 is the first term, d is the common difference and n is the nth term.
Given that the first term of the sequence is 2, the common difference is 4.
To find the 41st term of the sequence, we can use the formula:
a_41 = 2 + (41-1) * 4 = 2 + 40 * 4 = 2 + 160 = 162
Therefore, the 41st term of the sequence is 162.
a line y=mx+5 passes through the point 1,6 and is parallel to y=4x+6 what is the value of b
A y= -1/4x+2
B y=1/4x+5
C y=4x+2
D y=4x+5
The equation of the straight line would be -
y = 4x + 5.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that a line y = mx + 5 that passes through the point (1, 6) and is parallel to y = 4x + 6.
The general equation of a straight line is given by -y = mx + c
Here - {m} is slope and {c} is y - intercept.Equation of the line is -
y = mx + 5
It is parallel to -
y = 4x + 6
Then -
m = 4 {slopes of || lines are equal)
So, we get the equation as -
y = 4x + 5
Therefore, the equation of the straight line would be -
y = 4x + 5.
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PLS HELP Select the correct answer.
You work delivering food for a local farmer. You sell onions from the farm at these prices: 2 for $1.04, 4 for $2.52, 8 for $4.32, and 16 for $9.12. What is the unit cost per onion for the worst deal?
A.
$0.52
B.
$0.57
C.
$0.63
D.
$0.67
Answer:
C
Step-by-step explanation:
2.52/4 =0.63/1
a company prudces 3 types of cables a b c in-house production costs per foot of cables abc are 6 8 10
The in-house production amount costs per foot of cables A, B, and C are $6, $8, and $10, respectively.
1. The question states that a company produces three types of cables, A, B, and C.
2. The in-house production amount costs for each type of cable is given in the question. The cost per foot of cable A is $6, the cost per foot of cable B is $8, and the cost per foot of cable C is $10.
The company produces three types of cables, A, B, and C, and each type of cable has a different in-house production cost. Cable A has a cost per foot of $6, cable B has a cost per foot of $8, and cable C has a cost per foot of $10. This means that if the company produces 100 feet of cable A, the in-house production cost would be $600, whereas if they produce 100 feet of cable B, the in-house production cost would be $800, and if they produce 100 feet of cable C, the in-house production cost would be $1000.
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3) Lina has 20 boxes of markers. Next year, she plans to buy 20% more boxes. How many
boxes will she have in all? I need step by step explanation, thanks.
Answer:
44 boxes
Step-by-step explanation:
You have to find 20% of 20.
20% = 1/5
1/5 of 20 is 4
So next year she will buy 24 boxes
If you add them together, she will have 44 boxes in all
at a party with 10 people each person shakes the hand of every other person once how many handshakes occur
The number of handshakes altogether exists 45.
What is meant by combinations?In mathematics, there are two alternative methods for dividing up a collection of components into subsets: combination and permutation. The subset's components can be arranged in any sequence when used together. The components of the subset are arranged in a particular order in a permutation.
A combination in mathematics is a choice of elements from a set with distinct members, where the order of the choices is irrelevant.
Combinations are a mathematical method for calculating the number of alternative arrangements in a collection of objects where the order of the selection is irrelevant. You are free to choose any combination of the things.
Given:
Number of people in the conference = 10
Each person shakes hands with others.
The total number of handshakes [tex]$={ }^n \mathrm{C}_2$[/tex]
Total number of handshakes [tex]$={ }^{10} C_2=(10 \times 9) / 2=45$[/tex] handshakes.
The complete question is:
At the end of a meeting all the ten people present shake hands with each other once. The number of handshakes altogether is
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Sam has 3 1/4 pounds of blueberries. Ben also has some blueberries. Together, they have 4 2/3 pounds of blueberries. Create an equation to represent the number of pounds of blueberries, b, Ben has.
Answer:
2 1/2 + b = 4 2/3
