1.
A diver bounces off 3-m springboard at initial upward speed the water.\

a) create a quadratic model for the height of the diver above the water.

b)after how many seconds does diver enter the water?round to the nearest hundredth of a second

c) over what time interval is the height of the diver greater than 3.5 m above the water?round to the nearest hundredth of a second

You should know the formula s = ut+\frac12 at^2 to do the first one.