Both circle A and circle B have a central angle measuring 50°. The area of circle A's sector is 36π cm2, and the area of circle B's sector is 64π cm2. Which is the ratio of the radius of circle A to the radius of circle B?
The radius of a circle is 9 times the radius of a smaller circle. The area of the smaller circle is 50 square centimeters. What is the area of the larger circle?
