While working on a roof, Rob dropped his hammer. The hammer's fall can be represented by the equation $$h=-16t^2+20$$  (where t = time in seconds and h = height in feet). How long will it take the hammer to reach the ground?

To practice catching, the little league team uses a baseball-throwing machine. The pathway of the ball from the machine can be represented by the equation $$h=-16t^2+48t+4$$  (where t = time in seconds and h = height in feet). What will be the height of the ball after two seconds?

Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation $$h=-16t^2+72t+100$$  (where t = time in seconds and h = height in feet). How long will it take the coin to reach the stream?

The height of an arrow shot into the air can be represented by the equation $$h=-16t^2+112t+5$$  (where t = time in seconds and h = height in feet). What is the maximum height of the arrow?

The path of a toy rocket fired into the air can be represented by the equation $$h=-16t^2+75t$$  (where t = time in seconds and h = height in feet). What is the height of the rocket after 3 seconds?

The pathway of a frog jumping onto a lily pad can be represented by the equation $$h=-0.5t^2+3t+2$$  (where t = time in seconds and h = height in feet). What is the maximum height of the frog?

A punter kicks a football into the air. The pathway of the football can be represented by the equation $$h=-16t^2+82t$$  (where t = time in seconds and h = height in feet). How long will it take the football to reach the ground?

Ms. Rees threw her math book off a 30 foot building. The equation of the book can be represented by the equation $$h=-16t^2+24t+30$$  (where t = time in seconds and h = height in feet). What is the maximum height of Ms. Rees's math book?

The pathway of Garrett's dive into the swimming pool can be represented by the equation $$h=-16t^2+15t+12$$  (where t = time in seconds and h = height in feet). What is Sam's height after 1 second?