Stackrel(harr)(AB) is perpendicular to 'stackrel(harr)(CD)'. How many 90° angles are formed by the intersection?

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?

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.

Find the zeros of each function. f(x) = x^2 + 5x - 6