PLEASE HELP!

To hit a ball over a tree a golfer hits the ball with a path that is modeled by h=-16t^2+80t where (h) is the height in meters and (t) is the time in seconds. Determine
Part A: The height of the ball after 1 second

Part B: The time it takes the ball to reach it's maximum height'

Part C: The Maximum height of the ball

Part D: The time it takes for the ball to return to the ground.

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?