Answer:
b) 1
Step-by-step explanation:


Answer:
2,309.2
This could be wrong but I'm pretty sure it's right
Answer:
20. 300π m³
21. 457 1/3 π cm³
Step-by-step explanation:
20. r = 10 ÷ 2 = 5
V = 5² × 12 × π = 25 × 12π=300π m³
21. r = 14 ÷ 2 = 7

V = 457 1/3 π cm³
What do you need help with bud?