Answer:
5 inches
Step-by-step explanation:
The formula for area of a circle is [tex]A=\pi r^2[/tex]
Where
- A is area, and
- r is radius
We know area is 78.5, and we use 3.14 for [tex]\pi[/tex] and solve for r (radius):
[tex]A=\pi r^2\\78.5=(3.14)r^2\\\frac{78.5}{3.14}=r^2\\25=r^2\\r=\sqrt{25}\\ r=5[/tex]
The radius is 5 inches.
