Here's a doozy for ya.
A projectile is fired directly upward with a muzzle velocity of 860 feet per second from a height of 7 feet above the ground.
A) Determine a function for the height of the projectile t seconds after it's released.
B) How long does it take the projectile to reach a height of 100 feet on its way up?
C) How long is the projectile in the air?
So far, this is what I have for A.)
X=(860cos90*) + and then I get lost. Any takers????