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?

answer: i don't understand it

step-by-step explanation: sorry

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.