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bearhunter [10]
2 years ago
7

NEED HELP NOW 25 POINTS!!!!!!

Mathematics
2 answers:
antiseptic1488 [7]2 years ago
7 0
4) 62.8 cm^2
5) It is quadrupled

sergij07 [2.7K]2 years ago
6 0
First you have to find the area of the smaller inner circle:
A=<span>πr^2
A=</span><span>π4^2
A=</span><span>π16
A= 3.14 x 16
A= 50.24

Then, you have to find the area of the whole circle:
</span>A=πr^2
A=π6^2
A=π36
A= 3.14 x 36
A= 113.04
<span>
Now, you simply subtract 50.24 from 113.04 to get 62.8

</span>
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The angle measure of ACB is 9 degrees

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<u>Step-by-step explanation:</u>

To find the solution to the given problem, first we need to look into the point B. It consists two angles and both of them are on a straight angle. So, this means that the sum of angle ABC and CBD is 180 degrees, that is

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We know that \angle C B D=29^{\circ}. Therefore

               \angle A B C+29^{\circ}=180^{\circ}

               \angle A B C=180^{\circ}-29^{\circ}=151^{\circ}

Now, in the triangle ABC, we know that all three angles must sum 180 degrees,

               \angle C A B+\angle A B C+\angle B C A=180^{\circ}

               20^{\circ}+151^{\circ}+\angle B C A=180^{\circ}

               \angle B C A=180^{\circ}-20^{\circ}-151^{\circ}=9^{\circ}=\angle A C B

Therefore, the angle ACB is 9 degrees.

7 0
3 years ago
The expression (x^3)(x^-17) is equivalent to x^n".<br><br> What is the value of n?
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Step-by-step explanation:

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Http://www.jiskha.com/display.cgi?id=1412206557 here this should help
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An irregular polygon is shown below:
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4*2=8, 4-2=2, 2*9=18, 18+8= 26
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