Projectile Motion Problem - me verify my answer

[sugarbelle]

Homework Statement

A projectile is fired at an angle of 30.0 degrees above the horizontal with an initial velocity of 800.0 m/s from the top of a cliff 80.0 meters high. How far from the base of the cliff does it strikes the level ground below? Ignore friction.

Homework Equations

Can somebody help me with a relevant equation for this??

The Attempt at a Solution

 

[LawrenceC]

What equations are you studying?

 

[howie8594]

You should list all the numbers you're given and the units associated with them. Then look through the equations you're studying right now and figure out which one of those has everything you're given except the one unknown. You may need more than one equation for some of these types of problems.