Answer:
a. pi
Step-by-step explanation:
Answer:
1276.19553 
Step-by-step explanation:
First, find height using Pythagoras thorem.
a=
a=15.61
Then use the formula to find the surface area of a cone.
π•12.5•(12.5+
)=1276.19553 
Answer:
-42.667 or -128/3
Step-by-step explanation:
1 ( -64) 2/3
-64. 2/3
(-64.2)/3
-128/3