Answer:
a) 
b) what?
c) -70
Step-by-step explanation:
If you have any questions feel free to ask in the comments - Mark
sorry for the terrible answer
Answer:
a)B)9π
b)G)16π in²
Step-by-step explanation:
according to the question


as we know
C/d=π
C=dπ
Therefore
C=9π
A: 2.5 pounds= 2.5
B: 2.5 pounds= 1.63
C: 2.5 pounds= 1.25
Lowest to highest is C, B, A
50 is 10 times as much as 500