What percent of the population has an IQ between 120 and 157 if the mean is 100 with a standard deviation of 15?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Question 13 (1 point) jerome is starting a new job. his contract states he will earn $42,000 the first year, and will get a 4% raise per year. which function s(x) represents jerome's salary after a certain number of years, x?