Line qr has undergone a dilation.

the measure of qr is 15 cm, and the measure of q'r' is 52.5 cm. which scale factor was used for the dilation?

a.7

b.7/2

c.2

d.2/7

Does anyone know how to do geometryme with this problem

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.