3/10 and 1/2 with common denominator

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?