Answer:
1. 400Ï€ or about 125663.7061
2. 3.5Ï€ or about 10.99557429
3. 4Ï€ or about 12.56637061
4. 3Ï€ or 9.42 (I used 3.14 for pi like the directions said)
5. 56Ï€ or 175.84 (I used 3.14 for pi like the directions said)
Step-by-step explanation:
I'll add these later if you like.