A ball is dropped from the top of a 15-foot tall staircase. Write an equation for the height h of the ball t seconds after it is dropped. Find the time it takes for the ball to reach the ground?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Which math sentence can be used to determine if the triangle is a right triangle?

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250