Question

Round all answers to the nearest hundredth, 2 places after the decimal. a. Find A ifr = 8. b. Find A if r = 14.62 c. Find A if d = 28 d. Find A if d = 15.4

Answer 1

`\begin{gathered} A=3.14* r^2 \\ \\ \text{if r=8} \\ A=3.14*8^2 \\ A=3.14*64 \\ A=200.96 \\ \\ \\ if\text{ r= 14.62} \\ A=3.14*14.62^2 \\ A=671.16 \\ \\ \text{if d= 28, r= 14} \\ \\ A=3.14*14^2 \\ A=615.44 \\ \\ \text{if d=15.4, r = }7.7 \\ \\ A=3.14*7.7^2 \\ A=186.17 \end{gathered}`