3 years ago

If the pond has a radius of 6.5 ft how much fencing will he need

Mathematics

1 answer:

andre [41]3 years ago

5 0

6.5 times 2 then that time pi or 3.14

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adam put $100 in a savings account after 10 years he had $1649 in the account what rate of interest did he earn? use the formula

Nady [450]

Using the formula
ending amount is 1649=a
p=initial amount=100
t=10
r=r

so
1649=100e^{10r}
divide both sides by 100
16.49=e^{10r}
take ln of both sides
ln(16.49)=10r
divide both sides by 10
(ln(16.49))/10=r
use calculator
0.28027=r
about 28% interest

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3 years ago

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Elena L [17]

D- 4 is your correct answer :)

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2 years ago

kali bought 6 books for a total of $154. math books cost $27 and English books cost $23. how many of each type of book did she b

kipiarov [429]

She bought 4 English books and 2 math books

27 x 4 = 108
23 x 2 = 46
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2 years ago

A population has a standard deviation of 5.5. What is the standard error of the sampling distribution if the sample size is 81?

VladimirAG [237]

Answer:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

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

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

Step-by-step explanation:

For this case we know the population deviation given by:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

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

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

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3 years ago

Kim needs 10 cups of apple juice for a recipe. How many quarts does she need?

sergey [27]

She will need 2.5 quarts.

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2 years ago