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

Question

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

This is a problem in open channel flow in Fluid Mechanics, not a pre-calc problem. A proper solution needs calculus and a better description of the harbor bottom.

An intuitive set-up based on the information you've given would be
h = (e^-kt)[(10 - 9) - 9sin(2πt/15)]
where h is in feet, t is in minutes, and k is a damping constant, probably on the order of 1/15.

Answer 2

If x = fare cost, and y = riders according to day y = -200x+1400 i got here across this out by utilising take the 1st element (2,1000) If the fare increasing motives a subtraction of riders, then that's a damaging slope. To get the y-intercept, only play it with the aid of til you artwork out what share purchasers if the fee exchange into unfastened (x=0). If all of us be attentive to 50 purchasers is lost for $0.25, then 2 hundred purchasers are lost for each $a million. as a result, 4 hundred purchasers are lost for an advance of $2. the two a similar by utilising asserting 4 hundred purchasers are won by utilising reducing the fee by utilising $2. So with the values of (0,1400) and (2,1000). only get an equation from that. The y-intercept is going to be 1400. The slope is the exchange in y divided by utilising the prospect in x. so as that's a transformation of -4 hundred for 2 x's, or -2 hundred according to x. So the slope is -2 hundred. Forming the ideal equation of: y = -200x+1400

Answer 3

where's the question?