Which expression represents the phrase?

"15 fewer than the quotient of a and b."

If you answer 2+2 you will get over 80 points

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

The height above the ground (in feet) of a ball dropped from the top of a 30-foot-tall building after t seconds is given by the polynomial: ? 16t^2+30 what is the height of the ball after 1/2 second?