What formular for surface area of hemisphere

1 answer:

3 0

Well the formula for the surface area of a sphere is 4 x pi x r^2. Which means that the surface area for a hemisphere is half of that. The surface area of a hemisphere is 2 x pi x r^2

Hope this helps!

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If a restaurant uses 4 potatoes for a party of 12 and need to cook for a party of 60, what do they do

topjm [15]

They have to multiply the amount of people by 5 because 60÷12=5 meaning you'll have to do the same to the 4 which will make it 20 potatoes. Hope this helps! :)

<h2>-CloutAnswers</h2>

8 0

2 years ago

Read 2 more answers

Which shows the list below in order from greatest to least. 3.4848, -3 19/20, √11, -3.58, 362%

Free_Kalibri [48]

Let’s go left to right and convert everything to decimals.

3.4848 is 3.4848
-3 19/20 is -3.95
-3.58 is -3.58
Sqrt (11) is about 3.3
362% is 3.62

Using this, you can easily put them in order

6 0

2 years ago

Solve the proportion 26/z=13/22

Setler79 [48]

Z=44

Solve the rational equation by combining expressions and isolating the variable z

4 0

2 years ago

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

Korolek [52]

Answer:

A sample of 499 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is given by:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

In this question, we have that:

$\pi = 0.21$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

How large a sample would be required in order to estimate the fraction of tenth graders reading at or below the eighth grade level at the 90% confidence level with an error of at most 0.03

We need a sample of n, which is found when $M = 0.03$ . So