Answer:
radius = 14.5 feet
Step-by-step explanation:
91.06 / 3.14 = diameter = 29
radius = 29/2 = 14.5 feet
Plug in D:
-4(1)^2 + 15(1)^2/5
-4 + 15 / 5
-4 + 3 = -1
0