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DIA [1.3K]
3 years ago
10

a semicircle has a diameter of 18 centimeters. what is its area? (use 3.14 for pi)a 1017.36 cm 2b 56.52 cm 2c 127.17cm 2d 113.04

cm 2
Mathematics
1 answer:
IgorC [24]3 years ago
8 0
Area of semicircle = 1/2 x pi x r^2; where r = d/2 = 18/2 = 9cm.
Area of semicircle = 1/2 x 3.14 x (9)^2 = 1/2 x 3.14 x 81 = 127.17 cm^2
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7 0
3 years ago
Choose the correct simplification of the expression a^7b^8/a^4b^4
Alex787 [66]
The answer is B: a^3b^4<span>

Proof:
Simplify the following:
(a^7 b^8)/(a^4 b^4)

Combine powers. (a^7 b^8)/(a^4 b^4) = a^(7 - 4) b^(8 - 4):
a^(7 - 4) b^(8 - 4)

7 - 4 = 3:
a^3 b^(8 - 4)

8 - 4 = 4:
Answer:  a^3 b^4

PS: I just wish that you put the equation down as it's intended i.e.
a^7b^8/a^4b^4 is not the same as (<span>a^7b^8)/(a^4b^4)</span>
</span>
4 0
3 years ago
Read 2 more answers
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