A hiker drops a heavy stone over a cliff and hears it strike the cliff base 2.8 seconds after dropping it. If the velocity of sound is 335 m/s, how high is the cliff?

You wanna know what the answer is? Do it yourself. Honestly I know that this is a bonus question and that you will get extra points on a test. Stop trying to cheat ur way through high school and do it all by yourself. Here is a little hint though sound has no acceleration.