I uploaded the answer to a file hosting. Here's link:

Answer:490pi
Step-by-step explanation:just trust me
Answer:
It's not 2pi/3 so my next guess would be pi/3 but im not sure
Step-by-step explanation:
Answer:
x = 10.5
Step-by-step explanation:
Work in the screenshots
I used a online calculator
symbolab. com
Ummm this confuses me a bit