that doesnt make sense
Martin wants to build an additional closet in a corner of his bedroom. Because the closet will be in a corner, only two new walls need to be 1 built . The total length of the two new walls must be 12 m.
Martin wants the length of the closet to be twice as long as the width, as shown in the diagram.
b) Let the function f(l) be the sum of the length and the width. Find the equation for f(1).
c) Graph y = f(l).
d) Find the desired length and width. ile riding a
The relationship between the length & the width of the closet and the length of the wall is an illustration of a linear equation.
The equation for f(l) is: \(f(l) = 1.5l\).The desired length and width are 8m and 4mGiven that:
\(l = 2w\)
Divide both sides by 2
\(w = 0.5l\)
Equation of f(l)
The sum of the length and the width is represented as: f(l).
So, we have:
\(f(l) = l + w\)
Substitute \(w = 0.5l\)
\(f(l) = l + 0.5l\)
\(f(l) = 1.5l\)
See attachment for the graph of f(l)
The desired dimension
From the question, we understand that the total length is 12m.
This means that:
\(f(l) = 12\)
So, we have:
\(1.5l = 12\)
Divide both sides by 1.5
\(l = 8\)
Recall that:
\(w = 0.5l\)
\(w = 0.5 \times 8\)
\(w = 4\)
Hence, the desired length and width are 8m and 4m, respectively.
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Juanita borrowed $600 to purchase a new computer. She was charged 7% interest for two years. She used the simple interest formula to find the interest.
I = 600(7)(2)
What error did Juanita make and how will her error affect the interest she calculates? Explain.
please help
Answer:
The error she made was multiplyng by 7. This would affect her calculations as 7 in percentage form is represented as 700%. The 700% interest would basically mean she owes 7 times the amount she borrowed. The correct number would be 0.07 because 0.07 represents 7% which is the interest. Another error that was made was multiplying 2 to the entire equation. The only thing that needs to be doubled is the interest as every year the interest takes 7%. The correct way would be to put 0.07*2 in paranthesis. The correct equation is
I = 600(0.07*2)
A chain weighs 10 pounds per foot. How many ounces will 3 inches weigh?
Answer:
40 ounces
Step-by-step explanation:
One foot = 12 inches
3 inches is 1/4 of a foot
Divide 10 pounds by 4 to get 2.5 pounds
Convert to ounces
Determine whether Rolle's Theorem can be applied to f on the closed interval [a, b]. (Select all that apply.)
f(x) = −x2 + 2x, [0, 2]
Yes, Rolle's Theorem can be applied.
No, because f is not continuous on the closed interval [a, b].
No, because f is not differentiable in the open interval (a, b).
No, because f(a) ≠ f(b).
Answer:
A) Yes, Rolle's Theorem can be applied!
Step-by-step explanation:
Rolle's theorem states that if a function f is continuous on the closed interval [a, b] and differentiable on the open interval (a, b) such that f(a) = f(b), then f′(x) = 0 for some x with a ≤ x ≤ b.
Here, for our continuous function \(f(x)=-x^2+2x\) over the closed interval \([0,2]\), we can tell that the function is clearly differentiable over the interval \((0,2)\) as \(f'(x)=-2x+2\), so we'll need to check if \(f(0)=f(2)\):
\(f(0)=-0^2+2(0)=0\\f(2)=-(2)^2+2(2)=-4+4=0\)
Next, we'll need to check if f'(x) = 0 for some x within the closed interval:
\(f'(x)=-2x+2=0\\-2x+2=0\\-2x=-2\\x=1\)
As x=1 is contained in [0,2] and the previous conditions were met, Rolle's Theorem can be applied!
State in words the rule defined by each of the functions below. For example, in (a) the rule for f is "multiply the input by 6"a) f(x) = 62.b) f(x) = 2x - 3.c) h(t) = 3 - 5.
Answer:
a) \(f(x) = 6x\)
if x = input
then the function of the input is to "multiply the input by 6"
b) \(f(x) = 2x - 3\)
the function of the input = two multiply by the input minus six
c) \(h(t) = t^3 - 5\)
the function of the input = the cube of the input minus five
Step-by-step explanation:
Given that:
a) \(f(x) = 6x\)
b) \(f(x) = 2x - 3\)
c) \(h(t) = t^3 - 5\)
The objective is to state in words the rule defined by each of the functions
We are being given the first question as a sample that:
a) \(f(x) = 6x\)
if x = input
then the function of the input is to "multiply the input by 6"
b) \(f(x) = 2x - 3\)
the function of the input = two multiply by the input minus six
c) \(h(t) = t^3 - 5\)
the function of the input = the cube of the input minus five
A rectangular poster is 50 centimeters long and 25 centimeters wide. If 1 centimeter is approximately 0.4 inches, which of the following best represents the area of the poster in inches?
The area of the poster in inches is,
⇒ A = 4 inches²
We have to given that;
A rectangular poster is 50 centimeters long and 25 centimeters wide.
Here, 1 centimeter is approximately 0.4 inches
Hence, Lenght = 50 cm
Lenght = 50 x 0.4
= 2 inches
Width = 25 cm
= 25 x 0.4
= 1 inches
Thus, The area of the poster in inches is,
⇒ A = 1 x 4
⇒ A = 4 inches²
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There are 4 captains of the football team. How many different ways can they line up to receive their championship rings? O C. 24 B. 10 ОА. 4 O D. 256
ok let me check
_______________________
Permutation
the order is important (in this case there are 4 captains in 4 positions)
P = n !
P= 4 *3 *2* 1 = 24
______________
Answer
choice c= 24
F. Why would a linear function describing an investment made at a bank have a minimum
value but no maximum value? Explain your reasoning.
Answer: The function would have a minimum value because the least you will ever have is 0$. It cannot go below 0, so that is the minimum. However, depending on how much time has passed, the maximum amount of money you have can change. It can always go up more, so there is no set maximum.
Step-by-step explanation:
if you are writing equivalent expression for 2^3 · 2^4, how many times would you write 2 as a factor?
Answer:
7 times
Step-by-step explanation:
In order to find the answer to this question you have to remember that when dealing with exponents you need to multiply the number to itself as many times as the exponent. In this case we have 2^3 we then need to multiply two by itself three times because three is it's exponent.
\(2^3 \times2^4\)
\(2^3=2\times2\times2\)
\(2^4=2\times2\times2\times2\)
\(2\times2\times2\times2\times2\times2\times2=\)
\(3+4=7\)
\(=7\)
Hope this helps.
Revenue from Monorail Service, Las Vegas In 2005 the Las Vegas monorail charged $3 per ride and had an average ridership of about 28,000 per day. In December 2005 the Las Vegas Monorail Company raised the fare to $5 per ride, and average ridership in 2006 plunged to around 19,000 per day.
a. Use the given information to find a linear demand equation.
b. Find the price the company should have charged to maximize revenue from ridership. What is the corresponding daily revenue?
c. The Las Vegas Monorail Company would have needed $44.9 million in revenues from ridership to break even in 2006. Would it have been possible to break even in 2006 by charging a suitable price?
Answer:
A)The required linear demand equation ( q ) = -4500p + 41500
B) $4.61
$95680.55
C) No it would not have been possible by charging a suitable price
Step-by-step explanation:
A) find the linear demand equation
given two points ; ( 3, 28000 ) and ( 5, 19000 )
slope ( m ) = ( y2 - y1 ) / ( x2 - x1 )
= ( 19000 - 28000 ) / ( 5 - 3 ) = -4500
slope intercept is represented as ; y = mx + b
where y( 28000) = -4500(3) + b
hence b = 41500
hence ; y = -4500x + 41500
The required linear demand equation ( q ) = -4500p + 41500 ----- ( 1 )
p = price per ride
B ) Determine the price the company should charge to maximize revenue from ridership and corresponding daily revenue
Total revenue ( R ) = qp
= p ( -4500p + 41500 )
hence R = -4500p^2 + 41500p ------ ( 2 )
To determine the price that should maximize revenue from ridership we will equate R = -4500p^2 + 41500p to a quadratic equation R(p) = ap^2 + bp + c
where a = -4500 , b = 41500 , c = 0
hence p = \(-\frac{b}{2a}\) = \(- \frac{41500}{2(-4500)}\) = 4.61
$4.61 is the price the company should charge to maximize revenue from ridership
corresponding daily revenue = R = -4500p^2 + 41500 p
where p = $4.61
hence R = -4500(4.61 )^2 + 41500(4.61) = $95680.55
C) No it would not have been possible by charging a suitable price
Could you show the work so I can learn? Thank you!
Answer:
38363
Step-by-step explanation:
Erica decides to paint the birdhouse. She has a pint of
paint that covers 32.5 ft2 of surface. How can you tell that Kali has
enough paint without calculating?
Answer:
Step-by-step explanation:
If the birdhouse is a cube that is 2 ft on each edge, the surface area is 6×2² = 24 ft². That's a pretty large birdhouse, and it will need about ¾ of a pint of paint.
At a sale this week, a sofa is being sold for $117.60. This is a 72% discount from the original price. What is the original price?
You have solved a radical equation. What should you do to check whether your proposed solution is correct?
You should check your proposed solution in any of the equations you found while looking for the solution.
You don't need to check whether your proposed solution is correct. You know you followed the proper method, so it should be fine.
You should check the proposed solution in the original equation.
You should check the proposed solution in the back of the book because it is always right.
Answer:You should check the proposed solution in the original equation.
Step-by-step explanation:
The radical is the symbol that is used to represent the root in the expression n√x. The correct option is C.
What is a radical?The radical is the symbol that is used to represent the root in the expression n√x.
You have solved a radical equation. Now, to check whether your proposed solution is correct You should check the proposed solution in the original equation.
Hence, the correct option is C.
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A population is normally distributed with mean 36.3 and standard deviation 0.5. Find the following probability. (Round your answer to four decimal places.) p( 36.3 < x < 36.8 )
The probability value for the normal distribution is between 0 and 1 that is 0<Pr<0.3413
First, we need to get the z-value for both x-values
The formula for calculating the z-score is expressed as:
\(z=\frac{x-\mu}{\sigma}\)
If x = 36.3
\(z=\frac{36.3-36.3}{0.5}\\z=\frac{0}{0.5}\\z=0\)
Similarly, if x = 36.8
\(z=\frac{36.8-36.3}{0.5}\\z=\frac{0.5}{0.5}\\z=1.0\)
This shows that the z-value for the normal distribution is between 0 and 1 that is 0<z<1
The probability value for the normal distribution is between 0 and 1 that is 0<Pr<0.3413
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The guidelines for a wheelchair ramp suggest that the ratio of the rise to the run be no greater than 1 : 12
A. Which wheelchair ramps follow the guidelines
A. A ramp with a length of 30 feet and a height of 3 feet
B. A ramp with a length of 20 meters and a height of 0.5 meters
C. A ramp with a length of 384 inches and a height of 32 inches
D. A ramp with a length of 1 feet and a height of 12 feet
B. A wheelchair ramp provides access to a building with a front door that is 2.5 feet above the sidewalk. Which best describes the possible length(s) for the ramp that will follow the guidelines.
Let x represent the length (in feet) of the ramp
A. X < 30
B. X > 30
C. X ≥ 30
D. X ≤ 30
Answer:
Q1. Answer: According to the guidelines, the ratio of the rise (height) to the run (length) of a wheelchair ramp should be no greater than 1:12.
Option A: A ramp with a length of 30 feet and a height of 3 feet. The ratio of the rise to the run is 3/30 = 1/10, which is less than 1:12, so this ramp follows the guidelines.
Option B: A ramp with a length of 20 meters and a height of 0.5 meters. The ratio of the rise to the run is 0.5/20 = 1/40, which is less than 1:12, so this ramp follows the guidelines.
Option C: A ramp with a length of 384 inches and a height of 32 inches. The ratio of the rise to the run is 32/384 = 8/96 = 2/24, which is less than 1:12, so this ramp follows the guidelines.
Option D: A ramp with a length of 1 feet and a height of 12 feet. The ratio of the rise to the run is 12/1 = 12, which is not less than 1:12, so this ramp does not follow the guidelines.
Therefore, the ramps that follow the guidelines are options A, B, and C.
Q2. Answer: The guidelines for a wheelchair ramp suggest that the ratio of the rise (height) to the run (length) of the ramp should be no greater than 1:12. In this case, the rise is 2.5 feet and the run is the length of the ramp (x feet). The ratio of the rise to the run is 2.5/x.
To follow the guidelines, the ratio of the rise to the run should be no greater than 1:12, or 1/12. Therefore, the length of the ramp (x) should be greater than or equal to 2.5/1/12 = 30 feet.
Therefore, the correct answer is C: X ≥ 30.
Step-by-step explanation:
Given BCM=ZYR find each missing measure
Answer:
Step-by-step explanation:
Since, ΔBCM ≅ ΔZYR,
∠B ≅ ∠Z
∠C ≅ ∠Y
∠M ≅ ∠R
And BC ≅ ZY
CM ≅ YR
BM ≅ ZR
a). CM = YR = 11 m
b). BM = RZ = 15 m
c). YZ = BC = 8 m
d). m∠B = m∠Z = 45°
e). m∠M = 180° - [m(∠B) + m(∠C)]
= 180° - (45 + 103)°
= 180° - 148°
= 32°
f). m∠Y = m∠C = 103°
The side lengths are as follows: YZ is 8, BM is 15, and CM is 11. and angle B has a measure of 45 degrees. The angle C is 103 and the angle m is 32.
What is a Congruent triangle?
Congruent triangles are two triangles that are the same size and shape. They remain congruent if we flip, turn, or rotate one of two congruent triangles. If the sides of two triangles are the same, they must have the same angles and thus be congruent.
Congruent triangles have equal corresponding sides and angles
The measure of the side lengths are: YZ = 8,BM = 15 and CM = 11
The measure of the angles is angle B = 45. angle C = 103 and angle m =32
The given parameter is:
Tri angle BCM = Triangle ZYR
This means that triangles BCM and ZYR are congruent.
So, we have the following congruent sides
YZ = CB
BM = ZR
CM = YR
so, the measure of the side lengths are:
YZ = 8
BM = 15
CM = 11
Also, we have the following congruent angles
angle B = angle Z
angle C = angle Y
angle M = angle R
the measure of the angles are
angle B = 45
angle Y = 103
The measure of angle M is calculated using:
∠M + ∠C + ∠B = 180
∠M = 32
Therefore, The measure of the side lengths is: YZ is 8, BM is 15 and CM is 11. and The measure of the angles is angle B is 45. angle C is 103 and angle m is 32.
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researchers are testing a new diagnostic tool designed to identify a certain condition. the null hypothesis of the significance test is that the diagnostic tool is not effective in detecting the condition. for the researchers, the more consequential error would be that the diagnostic tool is not effective, but the significance test indicated that it is effective. which of the following should the researchers do to avoid the more consequential error?
Based on the null hypotheses, the type of error is Decrease the significance level to decrease the probability of Type I error.
According to the given question, the null hypothesis is that the new diagnostic tool is not effective in detecting the condition.
Here the more consequential error described is that the diagnostic tool is not effective, but the significance test indicated that it is effective. This is a type I error.
And in Hypothesis testing, a type I error involves rejecting the null hypothesis and accepting the alternative hypothesis when in reality, the null hypothesis is true.
Therefore, it involves saying there is significant evidence to show that the new diagnostic tool is effective in detecting the condition when in reality, it isn't.
When the level of significance (α) of a hypothesis test directly gives the probability of a type I error. So, by setting it lower, we reduce the chances of a type I error.
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Which set of integers is arranged from least to greatest?
A. -9, -7, -2, -6, -11
B-11-9-7-6, -2
C. -11, -7 -9, -6, -2 O
D. -2. -6, -7, -9, -11
Step-by-step explanation:
d is my correct answer ..
Compare 3√ 63 and 400% using <, >, or =.
√√63 >400%
√63 = 400%
C400%<√63
C400%> 63
On solving the provided question, 3√ 63 and 400% , so the answer is \(3\sqrt{63} = 23.81\) is greater
What is comparison?
This week, comparison questions—which require analysing similarities or differences across sets—are the sort of topic being discussed. Unknown difference: Estimating how much one set exceeds another is one form of comparison challenge.
Mathematicians refer to the process or method of comparing numbers as the use of their values to determine whether one number is less than, larger than, or equal to another. "," which means "less than," and "," which indicates "greater than," are the symbols used to compare numbers. "=" stands for "same."
here,
\(3\sqrt{63} = 23.81\)
and 400% =4
so \(3\sqrt{63} = 23.81\) is greater
\(3\sqrt{63} = 23.81\) > 400 %
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6) 75% of 24 is 18.
If 75% of 24 is 18, what is 25% of 24?
Answer:
6
Step-by-step explanation:
look
it up
1. Are the following events mutually exclusive?
Event A: Randomly selecting a male student at Riverdale High School.
Event B: Randomly selecting a member of the football team at Riverdale High School.
a. No, these are not mutually exclusive events
b. Yes, these are mutually exclusive events.
2. Use the Multiplication Rule to find the probability: The probability of a kidney transplant surgery is successful is 0.775. Find the probability of at least one surgery, out of 3, will be successful.
a. 0.997
b. 0.465
c. 0.535
d. 0.989
Answer:
Step-by-step explanation:
a. No, these are not mutually exclusive events because it is possible for a male student at Riverdale High School to be a member of the football team.
Using the Multiplication Rule, we can find the probability of at least one successful surgery out of three surgeries as follows:
P(at least one successful surgery) = 1 - P(no successful surgeries)
To find the probability of no successful surgeries, we use the complement rule and multiply the probabilities of three unsuccessful surgeries:
P(no successful surgeries) = 0.225 x 0.225 x 0.225 = 0.011390625
Therefore, the probability of at least one successful surgery out of three surgeries is:
P(at least one successful surgery) = 1 - 0.011390625 = 0.988609375
So, the answer is d. 0.989 (rounded to three decimal places).
Jane bought 6 boxes of beads. She used 14 of it to make face mask holders and also gave 12 of the boxes to her sister. How many boxes of beads were left?
Jane has 6 - 14 - 12 = -20 boxes of beads left.
Jane initially had 6 boxes of beads.
She used 14 of those boxes to make face mask holders and gave 12 boxes to her sister.
To find out how many boxes of beads she has left, we need to subtract the boxes used and given away from the initial number.
First, let's calculate the total number of boxes used and given away:
Total boxes used and given away = Boxes used for face mask holders + Boxes given to sister
Total boxes used and given away = 14 + 12
Total boxes used and given away = 26
Next, we can subtract the total boxes used and given away from the initial number of boxes Jane had:
Boxes left = Initial number of boxes - Total boxes used and given away
Boxes left = 6 - 26
Boxes left = -20
The result is -20, which implies that Jane has a deficit of 20 boxes of beads.
This means she doesn't have any boxes of beads left; she has a shortage of 20 boxes based on the activities she performed.
It's important to note that having a negative value indicates that Jane doesn't have enough boxes to fulfill her activities.
If the result were positive, it would represent the number of boxes remaining.
However, in this case, Jane has used and given away more boxes than she initially had, resulting in a negative value.
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a) Estelle has some rectangular tiles that are 12 cm long and 4 cm wide.
What is the smallest number of these tiles that are needed to make a
square?
b) Mason has some rectangular tiles that are 11 cm long and 3 cm wide.
What is the smallest number of these tiles that are needed to make a
square?
a) The smallest number of tiles needed to make a square is 3.
b) The smallest number of tiles needed to make a square is 11.
a) To make a square using rectangular tiles that are 12 cm long and 4 cm wide, we need to find the side length of the square that is divisible by both 12 and 4. The smallest common multiple of 12 and 4 is 12, so a square with a side length of 12 cm can be made.
To calculate the number of tiles needed, we divide the side length of the square by the length of each tile. In this case, 12 cm ÷ 4 cm = 3.
Therefore, the smallest number of tiles needed to make a square is 3.
b) To make a square using rectangular tiles that are 11 cm long and 3 cm wide, we need to find the side length of the square that is divisible by both 11 and 3. The smallest common multiple of 11 and 3 is 33, so a square with a side length of 33 cm can be made.
To calculate the number of tiles needed, we divide the side length of the square by the length of each tile. In this case, 33 cm ÷ 3 cm = 11.
Therefore, the smallest number of tiles needed to make a square is 11.
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What are the new vertices of quadrilateral KLMN if the quadrilateral is translated two units to the right and four units upward?
A)
K′ = (–2,0), L′ = (1,0), M′ = (1,–3), N′ = (–2,–3)
B)
K′ = (–2,2), L′ = (1,2), M′ = (1,–1), N′ = (–2,–1)
C)
K′ = (–0,0), L′ = (3,0), M′ = (3,–1), N′ = (0,–1)
D)
K′ = (–2,–2), L′ = (1,–2), M′ = (1,–5), N′ = (–2,–5)
9514 1404 393
Answer:
B) K′ = (–2,2), L′ = (1,2), M′ = (1,–1), N′ = (–2,–1)
Step-by-step explanation:
Translation 2 units right adds 2 to the x-coordinate.
Translation 4 units upward adds 4 to the y-coordinate.
The translation can be represented by the relation ...
(x, y) ⇒ (x +2, y +4)
__
You can choose the correct answer by looking at the translation of K.
K(-4, -2) ⇒ K'(-4+2, -2+4) = K'(-2, 2) . . . . . matches choice B
3. A random variable X with a probability density function f(x)= xe^ -x for x>0\\ 0& else
a. Find the probability that X is between 2 and 4
b. Find the probability that the value of X exceeds 3
c. Find the expected value of X
d. Find the Variance of X
The solutions to the questions are
The probability that X is between 2 and 4 is 0.314The probability that X exceeds 3 is 0.199The expected value of X is 2The variance of X is 2Find the probability that X is between 2 and 4The probability density function is given as:
f(x)= xe^ -x for x>0
The probability is represented as:
\(P(x) = \int\limits^a_b {f(x) \, dx\)
So, we have:
\(P(2 < x < 4) = \int\limits^4_2 {xe^{-x} \, dx\)
Using an integral calculator, we have:
\(P(2 < x < 4) =-(x + 1)e^{-x} |\limits^4_2\)
Expand the expression
\(P(2 < x < 4) =-(4 + 1)e^{-4} +(2 + 1)e^{-2}\)
Evaluate the expressions
P(2 < x < 4) =-0.092 +0.406
Evaluate the sum
P(2 < x < 4) = 0.314
Hence, the probability that X is between 2 and 4 is 0.314
Find the probability that the value of X exceeds 3This is represented as:
\(P(x > 3) = \int\limits^{\infty}_3 {xe^{-x} \, dx\)
Using an integral calculator, we have:
\(P(x > 3) =-(x + 1)e^{-x} |\limits^{\infty}_3\)
Expand the expression
\(P(x > 3) =-(\infty + 1)e^{-\infty}+(3+ 1)e^{-3}\)
Evaluate the expressions
P(x > 3) =0 + 0.199
Evaluate the sum
P(x > 3) = 0.199
Hence, the probability that X exceeds 3 is 0.199
Find the expected value of XThis is calculated as:
\(E(x) = \int\limits^a_b {x * f(x) \, dx\)
So, we have:
\(E(x) = \int\limits^{\infty}_0 {x * xe^{-x} \, dx\)
This gives
\(E(x) = \int\limits^{\infty}_0 {x^2e^{-x} \, dx\)
Using an integral calculator, we have:
\(E(x) = -(x^2+2x+2)e^{-x}|\limits^{\infty}_0\)
Expand the expression
\(E(x) = -(\infty^2+2(\infty)+2)e^{-\infty} +(0^2+2(0)+2)e^{0}\)
Evaluate the expressions
E(x) = 0 + 2
Evaluate
E(x) = 2
Hence, the expected value of X is 2
Find the Variance of XThis is calculated as:
V(x) = E(x^2) - (E(x))^2
Where:
\(E(x^2) = \int\limits^{\infty}_0 {x^2 * xe^{-x} \, dx\)
This gives
\(E(x^2) = \int\limits^{\infty}_0 {x^3e^{-x} \, dx\)
Using an integral calculator, we have:
\(E(x^2) = -(x^3+3x^2 +6x+6)e^{-x}|\limits^{\infty}_0\)
Expand the expression
\(E(x^2) = -((\infty)^3+3(\infty)^2 +6(\infty)+6)e^{-\infty} +((0)^3+3(0)^2 +6(0)+6)e^{0}\)
Evaluate the expressions
E(x^2) = -0 + 6
This gives
E(x^2) = 6
Recall that:
V(x) = E(x^2) - (E(x))^2
So, we have:
V(x) = 6 - 2^2
Evaluate
V(x) = 2
Hence, the variance of X is 2
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Are these ratios equivalent?
2:4 and 6:16
Answer:
no
Step-by-step explanation:
2:4 is 1:2, 6:16 is not one half
Answer:
No
Step-by-step explanation:
4/2=2
16/6=2.666666667
I thought I understood how to get the answer, but I got the second question wrong so I don't know what to do. Can anyone explain to me how to do it? I also am dyslexic and have a hard time rounding numbers. So, I dont think I understood how to round to the nearest dollar.
Answer:
$223,787
Step-by-step explanation:
r = 0.02
C = 191,000
t = 8
S = 191,000 (1 + 0.02)⁸
Follow order of operations (PEMDAS).
S = 191,000 (1.02)⁸
S = 191,000 (1.171659381)
S = 223,786.9
(We want to round to the nearest dollar, which is the ones place, so ignore all digits after the tenths place.)
Rounding, S = 223,787
The length of human pregnancies from conception to birth varies accordingly to a distribution that is approximately normal with mean 266 days and standard deviation 16 days. a study enrolls a random sample or 16 pregnant women. what are the mean and standard deviation of the sampling distribution of Xbar? What is the probability the average pregnancy length exceed 270 days?
Answer:
The answer is below
Step-by-step explanation:
Given that mean (μ) = 266 days, standard deviation (σ) = 16 days, sample size (n) = 16 women.
a) The mean of the sampling distribution of Xbar (\(\mu_x\)) is given as:
\(\mu_x=\mu=266\ days\)
The standard deviation of the sampling distribution of Xbar (\(\sigma_x\)) is given as:
\(\sigma_x=\frac{\sigma}{\sqrt{n} } =\frac{16}{\sqrt{16} }=4\)
b) The z score is a measure in statistics used to determine by how much the raw score is above or below the mean. It is given by:
\(z=\frac{x-\mu}{\sigma/\sqrt{n} }\)
For x > 270 days:
\(z=\frac{x-\mu}{\sigma/\sqrt{n} }=\frac{270-266}{\frac{16}{\sqrt{4} } }=1\)
The probability the average pregnancy length exceed 270 days = P(x > 270) = P(z > 1) = 1 - P(z < 1) = 1 - 0.8413 = 0.1587 = 15.87%
Which real-life situation involves a linear function whose graph passes through the points? Y (0, 20) and x (4, 80)
A) the entrance fee to an amusement park is $15 and each book of ride tickets costs $20.
B) Jet ski rental costs $20 initially plus $15 for each hour.
C) Shoes are on a sale at a shoe store for $20 for the first pair and $17 for each additional pair.
D) You earn and deposit into a bank account money from chores at the rate of $20 per week.
Answer:
B) Jet ski rental costs $20 initially plus $15 for each hour.
Step-by-step explanation:
The equation of a line has the following format:
\(y = mx+b\)
In which m is the slope, which having two points on the line, is given by the change in y divided by the change in x, and b is the y-intercept, which is the value of y when \(x = 0\).
Passes through point Y (0, 20):
This means that \(b = 20\). So
\(y = mx+20\)
Slope:
Through points (0,20) and (4,80). So
Change in y: 80 - 20 = 60
Change in x: 4 - 0 = 4
Slope: 60/4 = 15
So
\(y = 15x+20\)
Situation:
We want a situation in which we have a fixed fee of 20, and then for each unit of time or of the product, and increase of 15. So the correct option is B