a diver dives from a ten meter diving board. the function f(x)=-4.9t^2+4t+10 models her height in meters above the pool at the time in t seconds at what time does she enter the water
When she enters the water, f(x) = 0.
0 = -4.9t² + 4t + 10
Solve for t by using the quadratic formula: t = [ -4 ± √(4² - 4 · -4.9 · 10) ] / [2 · -4.9 ] ---> t = 1.89 sec.
