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spayn [35]
2 years ago
8

A circle with a radius of 5 cm has an area of 25π cm2. Which is the best approximation for the area of one-half of this circle?

A. 39.3 cm2 B. 8.9 cm2 C. 19.6 cm2 D. 12.5 cm2
Mathematics
1 answer:
kotegsom [21]2 years ago
4 0

Answer:

A

Step-by-step explanation:

π=3.14159...

Full circle are 25π cm² = 25*3.14=78.5 cm²

Half 78.5 cm²/2 = 39.25 cm²

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Variable c is 5 more than variable
shutvik [7]
First, let us restate the given conditions

c is 5 more than variable a ( c = a + 5)
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Now, lets look at the answer choices and or given
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Simplified version :
c = a - 5
Here, c is 5 less than "a"...so automatically disqualified


a = c − 5
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simplified version:
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c = (a - 3) / 3
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 So, our answer is going to be the last one:
 
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