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LuckyWell [14K]
2 years ago
13

6) Molly invests $7,747 in a retirement

Mathematics
1 answer:
oksian1 [2.3K]2 years ago
4 0

Answer:

R = 9% per year

Step-by-step explanation:

You might be interested in
Certain transportation company has a fleet of 210 vehicles. The average age of the vehicles is 4.25 years, with a standard devia
-BARSIC- [3]

Answer:

z = \frac{4-4.25}{\frac{1.5}{\sqrt{40}}}= -1.054

And we can find the following probability:

P(z

And the last probability can be founded using  the normal standard distribution or excel.

Step-by-step explanation:

For this case we define the random variable X as the ages of vehicles. We know the following info for this variable:

\bar X = 4.25 represent the mean

\sigma =18/12=1.5 represent the deviation in years

They select a sample size of n=40>30. And they want to find this probability:

P(\bar X

Since the sample size is large enough we can use the central limit theorem and the distribution for the sample mean would be:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We can use the z score formula given by:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And if we find the z score for 4 we got:

z = \frac{4-4.25}{\frac{1.5}{\sqrt{40}}}= -1.054

And we can find the following probability:

P(z

And the last probability can be founded using  the normal standard distribution or excel.

3 0
3 years ago
Help stepmby step pls
pshichka [43]

Answer:

Ima say the answer is 9, likely she bought 6 more new and with the fire half were destroyed of this 6 new posters only are 3 left so she has 12 posters left that means only 3 are added to how much posters she had before, so in some words she started with 9 also 9+3=12.

For where it says write and equation I think the answer would be something like 9+6-3. In where it says work I want to assume is your explaination so you can use the first paragraph I made. Check Its prob a re do of the work you have done to make sure its right. Coming with "Define the value" Im not sure of this but i think is to define your equation.

4 0
3 years ago
How to do this question plz answer​
eduard

Answer:

see below

Step-by-step explanation:

\frac{3x^2+7x+4}{x^2+3x+2}\\\\=\frac{(3x+4)(x+1)}{(x+2)(x+1)}\\\\=\frac{3x+4}{x+2}\\\\

and the other

\frac{x^2-2x-8}{3x^2+7x+2}\\\\=\frac{(x-4)(x+2)}{(3x+1)(x+2)}\\\\=\frac{x-4}{3x+1}

8 0
3 years ago
A campus program evenly enrolls undergraduate and graduate students. If a random sample of 5 students is selected from the progr
Bezzdna [24]

Answer:

The answer is "0.03125".

Step-by-step explanation:

Two types of undergraduates exist. Its chance for selecting the very first person who is part of degree studies will be 1/2. The probability will also be 1/2 for the 2nd person, as well as, the 3rd, 4th, and 5th person. For 5 random samples, the probability of the graduate therefore is

\to \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} =  \frac{1}{32}=0.03125

4 0
3 years ago
5×(−2w−4) what is this simplified
Elis [28]

Answer:

-10w - 20

Step-by-step explanation:

You distribute the 5 to each term inside the parentheses. 5 * -2w = -10w, and 5 * -4 = -20. Then you add them to get -10w - 20.

5 0
3 years ago
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