Can someone help me with my precalculus problem? Can you please read the following problem and figure out the?

Question

Can someone help me with my precalculus problem? Can you please read the following problem and figure out the?

Can someone help me with my precalculus problem? Can you please read the following problem and figure out the equation for me along with how you figure this out?


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

Gary, that's a good one, but one mistake...
you said that a=b, thus you cannot divide by (a-b) b/c that equals zero, and you cant divide by zero.

Answer 2

The water would go down the same amount that it goes up so we would start with 10m. OOOHhhh! but there is only 9m of water there so it can only go down 9m. this means it can only go up 9 meters. 9 + 9 is a maximum depth of 18m.

Answer 3

I don't see a question, so

if a = b, then
a^2 = ab
a^2 - b^2 = ab - b^2
(a + b) x (a - b) = b x (a - b)
(a + b) x (a - b) / (a - b) = b x (a - b) / (a - b)
a + b = b
since a = b, substitute b for a, then
b + b = b
2 x b = b
2 x b / b = b / b
2 = 1

Answer 4

What exactly is the question?