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kobusy [5.1K]
3 years ago
6

PLEASE HELP I HAVE NO IDEA WHAT IM DOING!!!

Mathematics
1 answer:
algol133 years ago
8 0

Answer: 28.26


Step-by-step explanation:

What your looking for is called the annulus (or the difference of two concentric circles). You can find the annulus by subtracting the area of the inner circle from the area of the outer circle. Volume of a circle= πr²

You are given the diameter in these problems, so you need radius.

For the first circle (8 in one) :

8/2=4    r=4

A=3.14(4)²

A=50.24

For the second one (10 in one) :

10/2=5   r=5

A=3.14(5)²

A=78.5

To find the measure of the annulus, you subtract those numbers, getting 28.26


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The mean of six numbers is 41. If one number is removed, the mean of the five numbers is 46. Find the unknown number.
klasskru [66]
Let n be the sum of all 6 numbers:

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in the 2nd case n'/5 = 46===> n' =230, the unknown number is n-n' =246-230

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3 0
3 years ago
PLS HELP!! I WILL GIVE THE FIRST GOOD ANSWER BRAINLIEST!!!
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Answer:

in my opinion I think the answer is a because I don't know why

Step-by-step explanation:

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