I need help with this geometry

Mathematics

1 answer:

Marizza181 [45]3 years ago

6 0

I knew there was a formula for this, but did not remember it and so had to look it up. The formula is:

A = pi*r*(r + sqrt(h^2+r^2) )

Here, A = 3.14(4 ft)(4 ft + sqrt(36 + 16) = 140.9 square feet.

When in doubt about a formula, look it up!

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$640,3%,2 years?!?! Plz explain!!

mrs_skeptik [129]

I am pretty sure it is talking about interest and $640 is what you start with, with a 3% interest for 2 years

5 0

3 years ago

A sample of 64 was taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being

Fofino [41]

We have the sample size, sample mean and the sample standard deviation. Since the population standard deviation is not know, we will use t-distribution to find the confidence interval.

The critical t value for 95% confidence interval and 63 degrees of freedom is 1.998.

The 95% confidence for the population mean will be:

$(119-1.998 *\frac{16}{ \sqrt{64} } ,119+1.998 *\frac{16}{ \sqrt{64} }) \\ \\ 
=(115.004, 122.996) \\ \\=(115,123)$

Thus, the 95% confidence interval for the population mean will be (115,123)

So, option A is the correct answer

6 0

3 years ago

I still don't get it.

AlexFokin [52]

Ok? If there a question?

7 0

3 years ago

Read 2 more answers

Please help me out! And show your work :)) <3

8_murik_8 [283]

Answer:

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