Nick earns $12 per hour the store offers him a raise a 5% increase per hour after the raise how much will nick make per hour

Arandom high school question but a hard one

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.