Chapter 11.8, Problem 4ST2

To determine

To Find: The ratio of areas of circles.

Answer to Problem 4ST2

  $16:49$

Explanation of Solution

Given: Radius is $4and7$

Given: Radius = $4and7$

Area or circles.

  $\begin{array}{l}{A}_1=\pi r_1{}^2\\ $ A_1=\pi {(4)}^2$A_1=16\pi \\ A_2=\pi r_2{}^2\\ $ A_2=\pi {(7)}^2$A_2=49\pi \\ ratio\\ \frac{A_1}{A_2}=\frac{16}{49}\end{array}$