A rainstorm in Portland Oregon wiped out the electricity in 5% of the households in the city. Suppose that a random sample of 60 Portland households is taken after the rainstorm. a. Estimate the number of households in the sample that lost electricity by giving the mean of the relevant distribution (that is the expectation of the relevant random variable do not round your response.) b. Quantify the uncertainty of your estimate by giving the standard deviation of the distribution run your response to at least three decimal places.

Answers

Answer 1
I dont think im right but i think the answer is three. 

ps Portland is the most fun city in Oregon.

Related Questions

will the standard form 3.2 x 10 -4 be more or less than 1 Explain what effect the negative exponent has

Answers

First thing you got to do is solve the notation:

3.2×10^-4
=.000032

Its going to be lesser because anything that is get twice is less than one what's just say that...

1.2×10-2
=0012 so its going to be smaller than 1

Your answer is smaller.

A restaurent sold 350 less hotdogs than hamburgers. Altogether, the restaurant sold 700 hotdogs and hamburgers. How many of each did they sell?

Answers

Let x=number of hamburgers, so number of hotdogs is x-350.
Altogether x+x-350=700, 2x=1050, x=525, so the number of hamburgers is 525 and the number of hotdogs is 175.
Let d=# of hot dogs, and b=# of burgers.  d+b=700, and d = b-350.

d + b = 700 becomes b-350 + b = 700.   => 2b= 1050; b = 525.

Then d=525-350 = 175.

They sell 175 hot dogs and 525 burgers.

Do 175 and 525 add up to 700?   yes. 

The map of a biking trail is drawn on a coordinate grid.

The trail starts at P(−2, 1) and goes to Q(6, 1).
It goes from Q to R(6, −3) and then to S(9, −3).

What is the total length (in units) of the biking trail?

Answers

Is 23 unit lendgth fo bike tracks

List all integers between −100 and 100 that are congruent to −1 modulo 25.

Answers

"-1 modulo 25" is "1 less than a precise multiple of 25". 
So what are the exact or precise multiples of 25 in the appropriate interval? 
It is -75, -50, -25, 0, 25, 50, 75, and 100. 
Now just subtract 1 from each of them.

So the answers are -76, -51, -26, -1, 24, 49, 74, and 99.

When all seats are filled, a Ferris wheel can take 72 people for a rude. There are 313 people waiting to ride the wheel. Which drawing represents the number of rides with all the seats filled. Is the answer B?

Answers

Yes, the answer would be "b". There are a total of 313 people wanting to ride it. Only 72 people can ride it at a time. "x" in the drawing represents how much times is takes for all the people to ride it. You are correct, hope this helps! =)

After a substance abuse counselor has acquired 20,00 hours of counseling experience and has remained in good standing with their board certification, they are considered professionally co.petent and are non LONGER required to seek ongoing education?? True or false

Answers

That statement is false.
First reason is the knowledge of new type of substances will continue to appear so the substance abuse counselor will always be required to update his/her knowledge about the substance. Treatment for previosuly known substance also keep improving in inefficiency.
Second, the required hours to get the certification is 2,240 hours not 2,000.

Find the solution of the differential equation 3e^(3x)dy/dx=â9x/y^2

Answers

Final answer:

To solve the given differential equation, variables need to be separated, followed by integration of both sides. Since the equation involves both exponential and inverse square terms, separation of variables and integration are key steps. A specific solution also requires substituting a given function of y into the found general solution to determine any integration constants.

Explanation:

The question involves solving a differential equation 3e^(3x)dy/dx = -9x/y^2. First, we need to recognize this as a separable differential equation, which can be solved by isolating all terms involving y on one side and all terms involving x on the other side. After separation, we integrate both sides with respect to their respective variables.

Step 1: Separate the variables. We get dy/y^2 = -3x e^(-3x) dx.

Step 2: Integrate both sides. The integration of dy/y^2 with respect to y is -1/y, and the integration of -3x e^(-3x) with respect to x requires integration by parts or a table of integrals.

Step 3: Upon integration, we would find an implicit solution involving y and x, combined with an integration constant that needs to be determined based on initial conditions or additional information. Since specific initial conditions are not provided in the initial question, we'd include a constant C in our final expression.

For a specific solution when y(x) = cos(3x), additional steps are required to substitute this y expression into our general solution and solve for the constant.

If Sandy has 288 tiles and wants one-half of the tiles divided evenly into three different colors (green, yellow, burgundy). How many green tiles does she need?

Answers

To divide 1/2 of a value by 3 is the same thing as taking 1/2 * 1/3 = 1/6 of that value.

In this case, 1/6 of 288 tiles - or 288 ÷ 6 - gives us a result of 48 green tiles.

The required number of green tiles is 48

Given that,
Sandy has 288 tiles and wants one-half of the tiles divided evenly into three different colors (green, yellow, burgundy), How many green tiles she need is to be determined.


What is arithmetic?

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,

Here,
total number of tiles = 288
half of the tiles = 288 / 2 = 144
Now this half number of tiles is divided into 3 equal parts, in (green, yellow, burgundy)
= 144 / 3
= 48
So, she needs 48 green tiles.

Thus the required number of green tiles is 48.

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Choose the constant term that completes the perfect square trinomial x 2 - 18x

Answers

The missing term is +81 (halve the x term then square it).

The correct answer should be +18

( 10x-20) (6x + 8) what is the value of x

Answers

(10x-20)=(6x+8)

We simplify the equation to the form, which is simple to understand
(10x-20)=(6x+8)

Remove unnecessary parentheses
10x-20=(6x+8)

Remove unnecessary parentheses
10x-20=6x+8

We move all terms containing x to the left and all other terms to the right.
+10x-6x=+8+20

We simplify left and right side of the equation.
+4x=+28

We divide both sides of the equation by 4 to get x.
x=7

The solution is, the value of x is 7.

What is  simplification?

Simplify simply means to make it simple. In mathematics, simply or simplification is reducing the expression/fraction/problem in a simpler form. It makes the problem easy with calculations and solving.

here, we have,

given that,

(10x-20)=(6x+8)

We simplify the equation to the form, which is simple to understand

(10x-20)=(6x+8)

Remove unnecessary parentheses

10x-20=(6x+8)

Remove unnecessary parentheses

10x-20=6x+8

We move all terms containing x to the left and all other terms to the right.

+10x-6x=+8+20

We simplify left and right side of the equation.

+4x=+28

We divide both sides of the equation by 4 to get x.

x=7

Hence, The solution is, the value of x is 7.

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Graph the line for y+1=−35(x−4) on the coordinate plane.
Just write what the coordinates would be

Answers

i just did the test and your coordinates are (4,-1) and (9,-4). I am completely sure. Hope i was helpful.

Answer:

(0, 139) and (139/35, 0)

Step-by-step explanation:

To graph a line, two points are needed. Taking x = 0 and replacing this value in the equation, we get:

y+1=−35(0−4)

y = 140 - 1

y = 139

Then, the point (0, 139) is on the line.

Taking y = 0 and replacing this value in the equation, we get:

0+1=−35(x−4)

1/(-35) = x -4

1/(-35) + 4 = x

139/35 = x

3.971 = x

Then, the point (139/35, 0) is on the line.

A pineapple is 7 times as heavy as an orange. The pineapple also weighs 870 grams more than the orange. What is the total weight in grams for the pineapple and the orange?

Answers

The pineapple weighs 870 grams and the orange weighs about 124 grams.

A different species of cockroach has weights that follow a normal distribution with a mean of 50 grams. after measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams. based on this report,what is the approximate standard deviation of the weights for this species of cockroaches?

Answers

Final answer:

To find the standard deviation of the weights of a species of cockroach when it is known that 14% weigh more than 55 grams, you can use the Empirical Rule of a normal distribution and solve using the given mean and the equivalent standard deviation for the 14% threshold. The estimated standard deviation in this case is around 4.63 grams.

Explanation:

Your question is about using statistical information about a normally distributed population - in this case, the weights of a certain species of cockroach - to estimate the standard deviation of that population.

One thing we know about normally distributed data is that approximately 68% of all measurements fall within one standard deviation (either above or below) of the mean, about 95% fall within two standard deviations, and about 99.7% fall within three standard deviations. This is often referred to as the Empirical Rule or 68-95-99.7 rule.

According to the information provided, 14% of the cockroaches in the studied population weigh more than 55 grams. On a standard normal distribution, 14% represents approximately 1.08 standard deviations above the mean (you can find this value on a standard normal distribution table). Since we know that the mean weight is 50 grams, we can set up the following equation to solve for the standard deviation:

50 (mean weight) + 1.08 (standard deviation equivalents for 14%) * σ (standard deviation) = 55

Solving for σ we find that the standard deviation σ for the population of these cockroaches is approximately 4.63 grams.

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how can 32 ounces: 8 pints be simplified

Answers

32 oz : 8 pints can be simpified by dividing 8 from both sides

answer

4 oz: 1 pint (which is untrue technically, because technically it's 16 oz in 1 pint.. but it's the answer)

hope this helps

What does use a multiplicative comparison to explain its meaning mean?

Answers

Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

I hope this helps you.

find the quotient for 4 over 5389

Answers

5389/4
if you want the answer it would be 1347.25
I hoped I helped CX

Joan invests $4000 in an account that earns 3% simple interest. How much will Joan have in the account in 10 years?

Answers

9000 i think but i am not sure

If Joan invests $4000 in an account that earns 3% simple interest, she will have $5,375.67 in the account after ten years.

Sixteen more than a number is 48 which equation models this sentence

A 16n = r8
B n - 16 = 48
C n + 16 = 48
D n ➗ 16 =48

Answers

The word 'more' means addition.
So C. n + 16 = 48

Your answer A chef buys 5.46 pounds of ground turkey to make some casseroles. Each casserole requires 0.13 pound of turkey. How many casseroles can the chef make?

Answers

All you need to do is divide 5.46 by 0.13 to get 42
42 casseroles because literally all you have to do is divide 5.46 by 0.13 because you want to find out how many casseroles he can make, therefore you would need to use division. Really simple. 

Solve this quadratic equation using the quadratic formula. 5 - 10x - 3x2 = 0

Answers

The procedure is in the photo, good luck!

Answer:

Since, by the quadratic formula,

The solution of a quadratic equation [tex]ax^2+bx+c=0[/tex] is,

[tex]x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}[/tex]

Here, the given quadratic equation,

[tex]5-10x-3x^2=0[/tex]

[tex]-3x^2-10x+5=0[/tex]

By the above formula,

[tex]x=\frac{-(-10)\pm \sqrt{(-10)^2-4\times -3\times 5}}{2\times -3}[/tex]

[tex]=\frac{10\pm \sqrt{100+60}}{-6}[/tex]

[tex]=\frac{10\pm \sqrt{160}}{-6}[/tex]

[tex]=\frac{5\pm 2\sqrt{10}}{-3}[/tex]

[tex]\implies x=-\frac{5+2\sqrt{10}}{3}\text{ or }x=-\frac{5-2\sqrt{10}}{3}[/tex]

Please help me!
A pair of shoes is on sale for $29.95. What will the sales tax on the shoes be if the sales tax rate is
7 1/2%?
$1.99
$2.10
$2.25
$2.99

Answers

You need to find 7 1/2% of $29.95.
To do that, just multiply the percent by the number.

7 1/2% * $29.95 =

= 7.5% * $29.95

= 0.075 * $29.95

= $2.24625

The answer is $2.25

Option C)The sales tax will be $2.25.

Convert the sales tax rate from a percentage to a decimal,
7.5% becomes 0.075.

Multiply the decimal by the total cost of the shoes,

0.075 × 29.95
= 2.24625.

$2.25.

Therefore, the sales tax on the shoes will be $2.25,Option C

Lulu buys a dress for $67, a hat for $35, and shoes for $49. How much did Lulu spend?

Answers

Sum up $67, $35 and $49.  Answer:  $151.
67+35= $102+$49= $151

0/1 points | previous answers devorestat9 4.e.041. ask your teacher my notes question part points submissions used the automatic opening device of a military cargo parachute has been designed to open when the parachute is 200 m above the ground. suppose opening altitude actually has a normal distribution with mean value 200 and standard deviation 31 m. equipment damage will occur if the parachute opens at an altitude of less than 100 m. what is the probability that there is equipment damage to the payload of at least one of five independently dropped parachutes? (round your answer to four decimal places.)

Answers

0.3046% chance of damaging at least one of five payloads. First, determine how many standard deviations it takes for the parachute to open at 100 meters. So 200 m - 100 m = 100 m 100 m / 31 m = 3.2258 Looking up on a standard normal table, the probability of having that deviation or higher is 0.00061, or 0.061% Since you're looking for the probability of damaging at least one of five, the easiest way of calculating that is to subtract from 1 the probability of having all five parachutes successfully deploy. So 1 - (1 - 0.00061)^5 = 1 - 0.99939^5 = 1 - 0.996953719 = 0.003046281 = 0.3046%

Find the approximate side length of a square game board with an area of 164 in2

Answers

Squares have the same length and width.
Area of a rectangle/square is length X width
A=LW
164 = LW
Now we know L and W are the same because its a square.
13X13 is 169
12X12 is 144
It appears the lengths are just less than 13.

given b(x)=|x+4| what is b(-10)

Answers

[tex]b(x)=|x+4|\\ b(-10)=|-10+4|=|-6|=6.[/tex]

Answer:

Given that b(x)=|x+4| value of b(-10) is:

6

Step-by-step explanation:

|We are given that:

b(x)=|x+4|

We have to find the value of b(-10)

Putting x= -10 in above equation, we get

b(-10)=|-10+4|

       =|-6|

      =6

Hence, given that b(x)=|x+4| value of b(-10) is:

6

Output all of the numbers and their squares between 1 and 10 using a do while loop

Answers

Write a program that uses while loops to perform the following steps: a. ... d. Output all the numbers and their squares between 1 and 10. e.

4 gallons of gas cost 16.80. what is the price per gallon?

Answers

$4.20
Because $16.80 is the price of 4 gallons and if you want to find out the price for 1 gallon you divide 16.8 by 4

Divide mixed numbers
Write the mixed number(s) as_(blank)_fractions

Write the_(blank)_ of the divisor

Multiply as with _(blank)_.Simplify

Answers

A. improper fraction

There are 20 sixth grader and 25 seventh grader in the junior scholar club. For their first community service project, the Scholar Club president wants to organize the club members into equal-size groups. Each Group will have only sixth graders or only seventh graders.
A) How many students will be in each group if each group has the greatest possible number of members?
B) If each group has the greatest possible number of club members, how many groups of sixth graders and how many groups of seventh graders will there be? Please show the work and answers.

Answers

When You Mutiply 25 and 20, it equals 500

Answer: a) Each group has 5 members as its greatest possible.

b) There are 4 groups of sixth graders and 5 groups of seventh graders.

Step-by-step explanation:

Since we have given that

Number of sixth grader = 20

Number of seventh grader = 25

We need to find the greatest possible number of members in each group will contain:

For greatest possible number we will find "Highest common factor (H. C.F) of 20 and 25 = 5

a) Each group has 5 members as its greatest possible.

b) Number of groups of sixth graders would be

[tex]\dfrac{20}{5}=4[/tex]

Number of groups of seventh graders would be

[tex]\dfrac{25}{5}=5[/tex]

Hence, there are 4 groups of sixth graders and 5 groups of seventh graders.

Find the critical numbers of the function.
g(y) = y − 3 / y2 − 3y + 9

Answers

y=-y=-{\sqrt{2}}{2},\:y=\frac{\sqrt{2}}{2}
Final answer:

To find the critical numbers of the function g(y) = (y - 3) / (y^2 - 3y + 9), we need to find the values of y for which the derivative of g(y) is equal to zero or does not exist. By following the steps above, we find that the function has no critical numbers.

Explanation:

To find the critical numbers of the function g(y) = (y - 3) / (y^2 - 3y + 9), we need to find the values of y for which the derivative of g(y) is equal to zero or does not exist.

First, find the derivative of g(y) using the quotient rule:  g'(y) = (1*(y^2 - 3y + 9) - (y - 3)*(2y - 3)) / (y^2 - 3y + 9)^2. Simplify g'(y) by expanding and collecting like terms to get g'(y) = 6y^2 - 24y + 24 / (y^2 - 3y + 9)^2. To find the critical numbers, set g'(y) equal to zero and solve for y. In this case, there are no real solutions. Next, check for values of y where g'(y) does not exist. In this case, there are no such values.

Therefore, the function g(y) = (y - 3) / (y^2 - 3y + 9) has no critical numbers.

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