A bus travels with a constant speed of 48 miles per hour. How long will it take to travel 60 miles? Write your answer as a decimal number. Please help will give 34 points!!!

Need on this one asap im almost done with this subject

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?

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite