Answer:
Step-by-step explanation:
circumference = 2πr
2πr = 30π inches
Area = πr² = π*15*15 = 225π square inches
18% I believe. Because you do the math then you rounded out and then I get 18%
The easiest way is a calculator
It's still 36% because you droppet it and then gain it back up
83.57 i believe because you would round the 43 down so it would stay the same