Can someone figure out the equation for this pre calc word problem?

Question

Can someone figure out the equation for this pre calc word problem?

A tsunami (commonly called a “tidal wave” because of its effect is like a rapid change in tide) is a fast moving ocean wave caused by an underwater earthquake. The water first goes down from its normal level then rises at an equal distance about its normal level, and finally returns to its normal level, the period is about 15 minutes.

Suppose that a tsunami with an amplitude of 10 meters approaches pier Honolulu, where the normal depth of water is 9 meters.

Answer 1

There is no question here. A wave of amplitude 10 meters will rise 5 meters above normal and fall 5 meters below normal. That is about all tha can be said from your statement.

Answer 2

I dont think its finished, are you sure thats the whole problem?

Answer 3

I agree with Brandon T!!!!!!!!!!