Quadratic Practice

Cindy is standing on a diving board 24 feet above the pool. She jumps up from the diving board and hits the water after 1.5 seconds. What was Cindy's initial upward velocity?

When Mr. Kelly used to play baseball, he hit a lot of pop flies. This particular pop fly hit his bat at a height 3.5 ft above the ground and left the bat at a speed of 108 feet per second. At what time(s) was the height of the ball 53.5 feet in the air?

Hints : (1) Start by writing an equation for the situation

(2) Make sure your calculator is counting by 0.25

(3) There are two answers correct

Answer explanation

1. Write Equation

2. Enter into calculator

3. Look for 53.5 in Y1 column

4. Check what the x-value is

A toy rocket is launched into the air off of a 4 foot high platform with an initial upward velocity of 145 feet per second. Write a function rule that relates the ball's height above the field, h, to it's time in the air, t.