Simplify:
(sq root of) a^2 if a> 0

(sq root of) 36x^2 if x≤0

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?