Answer:
A. 56,000
B. 784,000,000
C. 620
D. 0.00000432
Step-by-step explanation:

Answer: 
Step-by-step explanation:


Answer:
R = 4cm
Step-by-step explanation:
V = π(R)²h = 480π
Divide by π
(R)²h = 480
Substitute h with 30
30*(R)² = 480
Divide by 30
(R)² = 16
Square root
R = 4cm
We do not accept R= -4 because it's a length, so it must be positive.