We must find the radius so we can plug this into the formula for surface area.
Circumference =


We are going to plug this in as our radius for the most accurate answer.
The surface area of a sphere is

Surface Area =

≈ 451.93 units
7. 233
8. 4
9. 6
10. 5
11. 4
12. 7
13. 7
Move all terms to the left side and set equal to zero. Then set each factor equal to zero.
x=2
<span>If 5y*2=80 then y is equal to 8</span>