volume of sphere=(4/3)pir^3
leave in terms of pi
1.
r=6.5
A=(4/3)(pi)(6.5^3)
A=(4/3)(pi)(274.625)
A=(366.166666)pi ft^3
answer is C (you are correct)
2. ok so it seems from last question that we round final answer to tenths place
ok so remember
d/2=r
18=d
18/2=9=r
A=(4/3)(pi)(9^3)
A=(4/3)(pi)(729)
A=972pi cm^3
put in 972 in blank (you are correct again)
3. aprox pi=3.14 for this question
r=3
A=(4/3)(3.14)(3^3)
A=(4/3)(3.14)(27)
A=(36)(3.14)
A=113.04 in^3
answer is C
ANSWERS
1. C
2. 972
3. C
