How do you do these questions?

How Do You Do These Questions?

Answers

Answer 1

Answer:

μ ≈ 2.33

σ ≈ 1.25

Step-by-step explanation:

Each person has equal probability of ⅓.

\(\left[\begin{array}{cc}X&P(X)\\1&\frac{1}{3}\\2&\frac{1}{3}\\4&\frac{1}{3}\end{array}\right]\)

The mean is the expected value:

μ = E(X) = ∑ X P(X)

μ = (1) (⅓) + (2) (⅓) + (4) (⅓)

μ = ⁷/₃

The standard deviation is:

σ² = ∑ (X−μ)² P(X)

σ² = (1 − ⁷/₃)² (⅓) + (2 − ⁷/₃)² (⅓) + (4 − ⁷/₃)² (⅓)

σ² = ¹⁴/₉

σ ≈ 1.25


Related Questions

Two vacationing families leave New York at the same time. They take 20 and 6 days, respectively, to reach their destination and return to New York. The vacationing families each take continuous trips to and from New York. How many days will pass before the two vacationing families leave New York on the same day again?​

Answers

Answer:

Step-by-step explanation: evagline has 3/5 of box of nuts.she uses it to fill 6 bowls

Which expression is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power?

1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power
1.5 raised to the eighth power divided by 0.7 raised to the seventh power
2.13
2.115

Answers

The expression is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power is; Option A; 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power

How to solve exponents?

We want to find the expression that is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power.

The sentence above can be expressed as;

((1.5⁵)/(0.7⁴))³

This can be broken down into;

[1.5^(5 * 3)]/(0.7^(4 * 3))

1.5¹⁵/0.7¹²

Looking at the options, the only correct one is;

Option A; 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power

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Answer: 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power

Step-by-step explanation: I did the test.

Find the missing number in the following fraction calculation
/7 ÷10 =3/35

Answers

x=6

Step-by-step explanation:

x ÷ 7 ÷10 = 3/35

(Use trial & error - since I knew x<7)

6/7 ÷ 10 = 3/35

Or

3/35 x 10

(then, simplify it to 6/7 or ÷ that by 1/7 to get 6)

Hope this helps!

you have 51 coins in your pocket, all dimes and quarters. You have $10.20. How many dimes and quarters do you have?

Answers

To find the number of dimes and quarters, you have 17 dimes and 34 quarters in your pocket , when there are 51 coins in your pocket.

To solve this problem, we can set up a system of equations using the given information. Let's use "d" to represent the number of dimes and "q" to represent the number of quarters.

We know that there are 51 coins in total, so we can write the equation: d + q = 51.

We also know that the total value of the coins is $10.20, which can be expressed as 10d + 25q (since dimes are worth 10 cents and quarters are worth 25 cents). So our second equation is: 10d + 25q = 1020.

To solve this system of equations, we can use substitution or elimination. Let's use substitution:

Rearrange the first equation to solve for d: d = 51 - q.

Substitute this expression for d in the second equation: 10(51 - q) + 25q = 1020.

Simplify and solve for q: 510 - 10q + 25q = 1020.

Combine like terms: 15q = 510.

Divide both sides by 15: q = 34.

Now substitute this value back into the first equation to solve for d: d + 34 = 51.

Subtract 34 from both sides: d = 17.

Therefore, you have 17 dimes and 34 quarters.

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Consider the function g(x)

Consider the function g(x)

Answers

it does not exist because the left and right do not match

A bus company took a tour bus on the ferry when there were 30 people aboard. The ferry charged the bus company $180. The following week, the bus had 50 people on board and the ferry charged them $220. How much is the "base rate" for the empty bus? hint: look at the difference between number of people and cost to get cost per person and then cost without people
How much does each person cost?
Write an equation to show cost, c, of a bus with x number of people on it

Answers

Answer:

Base rate: $120

Rate: $2 per person

Equation: f(x)=2x+120

Step-by-step explanation:

If 30 people cost $180 and 50 people cost $220, the charge for 20 extra people is $40.  This means, \(\frac{220-180dollars}{50-30people}=\frac{40dollars}{20people}=2\frac{dollars}{person}\).

These values correspond to a base rate for the bus of $120.

The function for the cost per bus with x number of people on it would be:

\(f(x)=2x+100\)

This can be checked by using the values given in the problem:

\(f(30)=2(30)+120=180\\f(50)=2(50)+120=220\)

The base rate of $120 and $2 per person satisfies the given equation and established values.

IN MAJOR NEED OF HELP

use the formula to find the leg of the triangle below. Make sure you show you show ur work. round to the nearest tenth if needed

Answers

The value of the missing leg from the triangle that has been shown is 8 mi .

Pythagoras theorem

The Pythagorean theorem provides a way to find the length of one side of a right-angled triangle if the lengths of the other two sides are known. It is widely used in various fields, such as engineering, architecture, physics, and trigonometry, to solve problems involving right triangles and calculate distances, angles, or other related quantities.

We know that;

\(c^2 = a^2 + b^2\\b^2 = 10^2 - 6^2\)

b = 8 mi

The Pythagorean theorem is named after the ancient Greek mathematician Pythagoras

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IN MAJOR NEED OF HELPuse the formula to find the leg of the triangle below. Make sure you show you show

Bill is making a movie and needs to cast some actors. There are 5 actors ( Anne, Lisa, Diana, Maggie, and Susan ) interested in playing the female lead role, and 2 actors ( Jacob and Mark ) interested in playing the male lead role. Anne and Mark are Bill's siblings. What is the probability Bill will cast a family member in the movie?

Answers

Answer:

2 out of seven or 2/7 or 28.5%

Step-by-step explanation:

there are two "yeses" out of 7 total choices

Select all numbers that have and absolute value of 0.6

Answers

I needed help on this... Answer:
l-0.6l and 0.6 and l 0.6 l
Step-by-step explanation:
a number in l x l for is to be changed to positive if not already!

(6m-7)x4. Please help meeee

Answers

Answer:

 =6mx^4−7x^4

Step-by-step explanation:

(6m−7)(x^4)

=(6m+−7)(x^4)

=(6m)(x^4)+(−7)(x^4)

\(\huge\text{Hey there!}\)

\(\mathsf{(6m - 7)\times4}\)

\(\mathsf{= (6m - 7)(4)}\)

\(\mathsf{= (6m - 7) 4}\)

\(\mathsf{= 4(6m - 7)}\)

\(\mathsf{= 4(6m) - 4(-7)}\)

\(\mathsf{= 6m(4) + (-7)(4)}\)

\(\mathsf{= 6m(4) - 7(4)}\)

\(\mathsf{= 6m - 28}\)

\(\huge\textbf{Therefore, your answer should be:}\)

\(\huge\boxed{\frak{24m - 28}}\huge\checkmark\)

\(\huge\text{Good luck on your assignment \& enjoy your day!}\)

~\(\frak{Amphitrite1040:)}\)

Please help asap! The question is below!

Please help asap! The question is below!

Answers

Based on the information, the hedgehogs have made the better offer

How to know who made the better offer

The Turkeys are offering a yearly salary of S(t) = 90000t over the course of eight years. To calculate the present value of each payment, an equation is used:

PV = S(t) * e^(-rt)

The variable "r" denotes a continuous interest rate of 0.03. "t" equals the years from t=0 to the time of payment. By this method, the current value of the Turkeys' offer can be assessed as follows:

PV(Turkeys) = ∫[0,8] 90000t * e^(-0.03t) dt

= 736,918.63

Comparatively, the Hedgehogs propose a yearly salary of S(t) = 80000t for nine years. Utilizing the formula employed in the previous scenario, the following result is derived:

PV(Hedgehogs) = ∫[0,9] 80000t * e^(-0.03t) dt

= 753,472.49

Given these calculations and the presumption that Rogelio may earn a continuous interest rate of 3% on his funds, it would best serve him to accept the Hedgehogs’ item offer since they have offered him a more favorable contract based on the accumulated present value of both contracts.

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Find the value of Q in the following system so that the solution to the system is (2,3).

Find the value of Q in the following system so that the solution to the system is (2,3).

Answers

D) 21

1) In this problem, to satisfy this condition, we need to plug into the 2nd equation that ordered pair.

2) Therefore, we can write out this:

\(\begin{gathered} I)\:x-2y=-4 \\ II)\:3x+5y=Q\Rightarrow3(2)+5(3)=Q\Rightarrow Q=21 \\ \end{gathered}\)

3) Thus, the answer is D. 21

robert just got his first job

Answers

Answer: Robert is equal to 23 little Roberts

Step-by-step explanation:

Common sense.

wow good job robert hooever that is

Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤ 44)? A. 0.025 B. 0.975 C. 0.84 D. 0.16 ​

Answers

A normal distribution has a mean of 50 and a standard deviation of 3 , the probability P(X ≤ 44) = P(Z ≤ -2) = 0.0241  option a) 0.025.

In probability theory, normal distribution is also known as Gaussian distribution. It is a probability distribution that is symmetrical, bell-shaped, and a continuous probability distribution. It's also a part of continuous probability distribution that describes real-valued random variables whose probability density function is affected by two parameters: the mean μ and the variance σ².

Let us consider the problem. Suppose a normal distribution has a mean of 50 and a standard deviation of 3. Firstly, we need to standardize the random variable X that is to convert it to the standard normal distribution. We use the following formula for this Z = (X - μ) / σwhere X is the random variable and μ is the mean, σ is the standard deviation of the population.

So in this case, we can write this as Z = (44 - 50) / 3 = -2

We have now obtained the standard score or standard deviation for the random variable X.

Now we need to calculate the probability P(X ≤ 44) = P(Z ≤ -2).

The probability of Z being less than -2 is denoted by the area under the standard normal curve to the left of Z = -2.

Using the standard normal table we look for the probability that corresponds to -2 and the closest we find is 0.0228.

This probability represents the area under the standard normal distribution to the left of Z = -2.

To calculate the area to the left of Z = -2, we add the area to the left of the next integer, which is -3, which we find from the standard normal table as 0.0013, 0.0228 + 0.0013 = 0.0241.

Therefore, the probability P(X ≤ 44) = P(Z ≤ -2) = 0.0241 or 0.025 (rounded to three decimal places)Therefore, the answer is option A. 0.025.

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please help.
definitions: 1. definition of right triangle
2. definition of isosceles TrianglesReflexive
3. HL
4. definition of perpendicular
5. CPCTC
6. reflexive​

please help.definitions: 1. definition of right triangle2. definition of isosceles TrianglesReflexive3.

Answers

From the two column proof below, we have seen ∠BAC ≅ ∠DAC by CPCTC

How to solve two column proof problems?

The two column proof to show that ∠BAC ≅ ∠DAC is as follows:

Statement 1: ΔABD is Isosceles with base BD, AC ⊥ BD

Reason 1: Given

Statement 2: AB ≅ AD

Reason 2:  Definition of isosceles Triangles

Statement 3: ∠1 and ∠2 are right angles

Reason 3: Definition of perpendicular

Statement 4: AC ≅ AC

Reason 4: Reflexive Property

Statement 5: ΔABC and ΔADC are right triangles

Reason 5: Definition of right triangle

Statement 6: ΔABC ≅ ΔADC

Reason 6: HL Congruency

Statement 7: ∠BAC ≅ ∠DAC

Reason 7: CPCTC

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100
0
-100
8.standard form?

Answers

Answer:

899.2/ 900

Step-by-step explanation:

helpppppp , quick answer with work pleaseeee​

helpppppp , quick answer with work pleaseeee

Answers

Answer:

Step-by-step explanation:

\(\sqrt{x-2}+8=x\\\\\sqrt{x-2}=x-8\\\)

Square both sides,

\(x-2=(x-8)^{2}\\\\x-2=x^{2}-2*x*8+8^{2}\\\\x-2=x^{2}-16x+64\\\\x^{2}-16x+64=x-2\\\\x^{2}-16x+64-x+2=0\\\\x^{2}-17x+66=0\)

Sum = - 17

Product = 66

Factors = -6 , -11

x² - 6x -11x + (-6)*(-11) = 0

x(x - 6) -11(x - 6) = 0

(x-6) (x - 11) = 0

x -6 = 0   ; x - 11 = 0

x = 6   ; x =11

Here,  x = 6 is a extraneous solution

Karrie’s mom has these flavors of juice boxes in a cooler. 4 grape 6 fruit 10 orange What is the ratio of the number of grape juice boxes to the total number of juice boxes in the cooler?
A. 1:16
B. 1:5
C. 1:4
D. 1:20

Answers

the answer is b the ratio would be 4:20 but it is simplified, therefor 1:5

simplify(4-x) (7+x)

Answers

(4-x) ( 7+ ×)

28 +4x -7x -x²

28 -3x - x²

simplify(4-x) (7+x)

Factor the expression. 12a+15=

Answers

3

(

4

+

5

)

Step-by-step explanation:

Hello!

Answer:

3(4a+5)

Step-by-step explanation:

Hope this helps :)

Substitute x=2 into the function f(x) = 3 +7e^0.58x Use e=2.72 to calculate your answer and give your answer to 2 decimal place
f(2)=​

Answers

The value of the function when x = 2 is 33.25.

What is exponential function?

A function with the formula f(x) = abˣ is an exponential function. A and b are constants, and b is a positive real integer that is greater than zero. The basis b determines how much the function increases or decreases, and x is the exponent or power that raises the base. The function shows exponential growth if b is bigger than 1, whereas the function shows exponential decline if b is between 0 and 1. Many phenomena, including population expansion, compound interest, radioactive decay, and the spread of infectious illnesses, are modelled using exponential functions.

The given function is \(f(x) = 3 +7e^{0.58x}\).

Substitute the value of x = 2 we have:

\(f(2) = 3 + 7(2.72)^{0.58(2)}= 3 + 7(2.72)^{1.16}\)

= 3 + 7(4.464)

= 33.25

Hence, the value of the function when x = 2 is 33.25.

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solve the inequality y-6>/2y-4

Answers

Answer:

Step-by-step explanation:

Let's solve your inequality step-by-step.

y - 6 > 2y - 4

y - 2y > -4 + 6

-y > 2

now divide by -1 and inequality sign changes

-y/-1 < 2/-1

y < -2

what is the missing polynomial?

what is the missing polynomial?

Answers

The missing polynomial is 40 - 4x - 12x²

How to find the missing polynomial

The missing polynomial is solved by comparing the polynomials as done below

? - (20 - 4x - 5x²) = 20 - 7x²

? =  20 - 7x² + (20 - 4x - 5x²)

comparing the terms

constant terms: 20 + 20 = 40

x terms : -4x

x² terms : -7x² - 5x² = -12x²

This can be combined as 40 - 4x - 12x²

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Question 15 pts
A line segment on a graph has endpoints of (-3,1) and (3,1). It is translated 5 units down and then, reflected across the x-axis.



What are the endpoints after the series of transformations?

Group of answer choices

(-3,-4 ) and (3,4)

(-3,-1) and (3,-1)

(-3,4) and (3,4)

(-3,-6) and (3,-6)

Question 25 pts
Between what two integers is the value of the square root of 21?
Group of answer choices

0 and 1

4 and 5

6 and 7

10 and 11


Question 35 pts
A grain of sand has a mass of approximately 6 x 10-2 grams. Earth has a mass of approximately 6 x 1028 grams.



How many times the mass of the grain of sand is the mass of Earth?



Group of answer choices

1 x 10 ^-54

1 x 10 ^-14

1 x 10 ^ 26

1 x 10 ^ 30


Question 45 pts
Jenna wants to hang outdoor stringed lights on her isosceles triangular roof. She wants to cover the base and both sides. The height of her roof is 18 feet and the base is 32 feet.

What is the approximate length, in feet, of lights that she will need?

Group of answer choices

48

64

80

98


Question 55 pts
For a classroom party, there are 12 bottles of fruit punch. Each bottle is filled with 850 cubic centimeters of punch. The fruit punch will be served in cone-shaped paper cups that are 7 centimeters across and 12 centimeters tall.



How many completely full cone-shaped cups of the punch can be poured?

Group of answer choices

16

66

232

265


Question 65 pts
A triangle is formed through the points (-3,1), (-3,4) and (5,1). What is the length of the triangle's hypotenuse.
Group of answer choices

square root of 11

square root of 24

square root of 55

square root of 73

Answers

Answer:

The 3rd one for the first and 2nd and 4th and 1st and 3rd and 1st

Step-by-step explanation:

What is the product of 4.5 ⋅ 10^5 and 1.6 ⋅ 10^2?

Answers

Answer: 450000, 160

Step-by-step explanation:

4.5 ⋅ 10^5 =

4.5*100000=

4*100000+0.5*100000=

400000+50000=450000

1.6 ⋅ 10^2=

1.6*100=

1*100+0.6*100=

100+60=160

The weight of an organ in adult males has a billship distribution with a mean of 330 g and a standard deviation of 50 g

Answers

Using the Empirical Rule, it is found that 99.7% of the weights are between 180 g and 480 g.

What does the Empirical Rule state?

It states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.Approximately 95% of the measures are within 2 standard deviations of  the mean.Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Hence, the bounds of the interval containing 99.7% of the weights is given by:

330 - 3 x 50 = 180 g.330 + 3 x 50 = 480 g.

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answer the question submitted

answer the question submitted

Answers

The function g(x) = 4x² - 28x + 49 can be rewritten as g(x) = 4(x - 7/2)² - 147 after completing the square.

To complete the square for the function g(x) = 4x² - 28x + 49, we follow these steps:

Step 1: Divide the coefficient of x by 2 and square the result.

  (Coefficient of x) / 2 = -28/2 = -14

  (-14)² = 196

Step 2: Add and subtract the value obtained in Step 1 inside the parentheses.

  g(x) = 4x² - 28x + 49

  = 4x² - 28x + 196 - 196 + 49

Step 3: Rearrange the terms and factor the perfect square trinomial.

  g(x) = (4x² - 28x + 196) - 196 + 49

  = 4(x² - 7x + 49) - 147

  = 4(x² - 7x + 49) - 147

Step 4: Write the perfect square trinomial as the square of a binomial.

  g(x) = 4(x - 7/2)² - 147

Therefore, the function g(x) = 4x² - 28x + 49 can be rewritten as g(x) = 4(x - 7/2)² - 147 after completing the square.

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The probable question may be:

Rewrite the function by completing the square.

g(x)=4x²-28x +49

g(x)= ____  (x+___ )²+____.

247 1372 as a number​

Answers

Answer:

Do you mean in words?

Step-by-step explanation:

then it is

Two million,four hundred and seventy one thousand,three hundred and seventy two.

WS SAMPLE
Find the area of each sector. Round your answers to the nearest tenth.
13)
60° 10 in

Answers

Area of sector would be,

⇒ Area of sector = 102.6 feet squared

We have to given that,

Radius of circle = 14 ft

Angle θ = 60°

Now, We know that,

Area of sector = [θ/360]πr²

Where, r is radius of circle.

Hence, We can substitute all the values, we get;

Area of sector = [θ/360]πr²

Area of sector = [60/360](22/7)(14)²

Area of sector = [1/6][22/7][196]

Area of sector = 102.6 feet squared

Thus, Area of sector would be,

⇒ Area of sector = 102.6 feet squared

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WS SAMPLEFind the area of each sector. Round your answers to the nearest tenth.13)60 10 in

Find the length of the hypotenuse of the right triangle.

Find the length of the hypotenuse of the right triangle.

Answers

Answer:

The length of the hypotenuse is 100.

Step-by-step explanation:

To find the length of the hypotenuse, we use the following formula:

c=\(\sqrt{a^2+b^2}\)

c=\(\sqrt{28^2+96^2}\)

c=\(\sqrt{10,000}\)

c=100

Therefore, the length of the hypotenuse is 100.

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Give at least two reasons why studying patterns of population is helpful in understanding U.S. history ? On february 13, a jewelry store sells an engagement ring with a sales price of $10,000 to a nervous young man, who pays in cash. the sale is subject to a 9.75 percent sales tax. Prepare the revenue portion of the February 13 journal entry for the jewelry store by selecting the account names and dollar amounts from the drop-down menus. Please select the word from the list that best fits the definitionStudy of the organization and operation of governments. Energy Change: Explain your ideas about energy changes that are taking place inside the mealworms.Remember: Materials that mealworms use (arrows going in) are reactants in chemical changes Materials that mealworm produce (arrows going out) are products of chemical changesWhen mealworms eat, chemical changes take place inside the mealworms. Chemical changes rearrange atoms. Bonds are broken in reactants. And new bonds are formed in the products.Evidence of a chemical reaction includes a color or temperature change. Evidence of a chemical reaction can also be a gas or solid product made.I think when a mealworm takes in_____ Ordinary arithmetic operations are meaningfula. either with quantitative or categorical datab. only with categorical datac. only with quantitative datad. with rank datac. only with quantitative data Name the following binary molecular compounds according to the prefix system.A. Carbon dioxideB. Carbon tetrachlorideC. Phosphorous penta chlorideD. Selenium hexaflourideE. diarsenic pentaoxide The nurse is caring for a 10 year old child wuth a head injury the nurse anticipated that the child will:_______ The area of the base of the nonagonal prism below is 40 squaremeters. Its volume is 320 cubic meters. What is the height of theprism? running merge sort on an array of size n which is already sorted is group of answer choices o(n log n) o(1) o(log n) no answer text provided. Eva follows the bond market and often purchases bonds issued by Sanden Research Labs. Last year, she purchased three such bonds in January, one in May, and four in June, then sold them all in November. Sanden Research Labs bonds were selling at 78. 430 in January, 95. 652 in May, 86. 220 in June, and 87. 454 in November. If each bond she purchased had a par value of $500, how much profit did Eva gain from buying and selling these bonds? a. $23. 81 b. $238. 10 c. $20. 60 d. $119. 5. What is the measurement of m? m=? 24 6 What state of matter does this model represent?1. Gas2. Liquid 3. Solid The first three terms of a sequence are given. Round to the nearest thousandth (if necessary). 6.2. ColN Find the 8th term. Murgatroyd Co. purchased equipment on January 1, 2019, for $860,000, estimating a five-year useful life and $120,000 residual value. In 2019 and 2020, Murgatroyd depreciated the asset using the double-declining-balance method. In 2021, Murgatroyd changed to straight-line depreciation for this equipment. What depreciation would Murgatroyd record for the year 2021 on this equipment? (Do not round your depreciation rate.) $63,200 $92,000. $85,333. $200,000 Do atoms with more electrons produce more or less spectral lines? Statements True False Capital budgeting involves planning and forecasting cash flows, sometimes many years into the future. Write and solve analgebraic equation for thesituation.Eight and one-half yearsago, Steven was 7 yearsold. How old is he now? how would I simplify by combining like terms. -5a - 4a + b You are a screenwriter who is writing a script for an hour-long police drama. You have written 20 1/2 pages for act 1 and 5 1/2 pages for act 2.How many pages have you written in total? someone please help me out