Use proportionals to find y.

Answer:y=12
First you need to divide the area by pi. Then take that answer and square-root it. Your answer should come out to about 3.2 is the radius.
1. 2(10)
4(20)
6(30)
I only know the answer to number 1 sorry. :/
Answer: have a good day :)

Answer:
10,000,000
Step-by-step explanation: