Question

Help me plz need help

Answer 1

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

Answer 2

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