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FinnZ [79.3K]
2 years ago
10

Help me plz need help

Mathematics
2 answers:
xxMikexx [17]2 years ago
8 0

Answer:

Step-by-step explanation:

use the area of a circle formula

A=pi r^2

78.5= pi r^2

78.5/ pi =r^2

24.9873..=r^2

\sqrt{24.9873} = r

4.9987...=r  in meters , pretty close to 5

atroni [7]2 years ago
4 0

Answer:

Concept: Area

  1. area = \pi {r}^{2}
  2. We are given area hence 78.5 square meters
  3. We want the radius so we isolate
  4. 78.5 = \pi {r}^{2}
  5. Isolate for r to get r= 4.99 or 5 square units approximately
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Let's subtract 9z from the left-hand side. That way, the 5w will be alone on the left-hand side.

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Answer:

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