Given two circles whose radii are 5" and 15", the ratio of their areas is

The answer to your question is ratio = 9

Step-by-step explanation:

Data

Circle 1 radius = 5''

Circle 2 radius = 15''

Process

1. - Calculate the area of circle 1

Area = πr²

Area = π (5) ²

Area = 25π

2. - Calculate the area of circle 2

Area = πr²

Area = π (15) ²

Area = 225π

3. - Calculate the ratio of the areas

ratio = 225π / 25π

= 9