Answer:

Step-by-step explanation:
Given function: 
To find
, simply input
into the function:

Answer: 4 bags
Step-by-step explanation: Good luck! :D
452.16 = 3.1416 r^2
r^2 = 452.16 / 3.1416
r^2 = 143.93
r = 11.997
C = 2 (3.1416) (12) =75.38 m
1.3 because you divide 80 and 60
Answer:
-a^2 or -b^2.
Step-by-step explanation: