Answer:
16
Step-by-step explanation:
4×.75=3
8×.75=6
16×.75=12
20×.75=15
let's find the area of the outer circle and the inside circle
the inside's circle area
A= π x 6²=36π
the outer's
A' = π x 4x²= 4πx²
A'-A=4πx²- 36π=160πcm² equivalent to x²- 9=40, so x²=49 implies x =sqrt(49)=7, x=7.
Answer: 12
Step-by-step explanation:
Answer:
its a
Step-by-step explanation: