If 15 out of 25 students are boys, what percent of the class is made up of boys?

Hello people, i have a math question that i need with, me, i will give the correct one brainiest, and for the other correct people, a and 5 stars.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?