Twice a number k plus the quantity s minus 2

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?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.