Lauren dove into a swimming pool from a 15 foot high diving board with an initial upwards velocity of 8 feet per second. Find the time t in seconds it took Lauren to enter the water. Used the model for vertical motion given by the equation h=-16t^2+vt+s where h is is height in feet, t is time in seconds, v is the initial upward velocity in feet per second and s is the initial height in feet. (H=0)