Thread: Estimating Rates of Change

I need help with the question: a diver is on the 10 m platform; the diver's height above the water, in metres, at time t can be modelled using the equation h(t) = 10 + 2t -4.9t². Estimate the rate at which the diver's height above the water is changing as the diver enters the water.

I know that the time that the diver hits the water is around 1.65 seconds and I tried to find the average rate of change between 0 seconds and 1.65 seconds, but the rate that I calculated was around -6 m/s.
I know that the correct answer is about 14 m/s but I'm not sure how to solve for this answer.
Any suggestions would be appreciated, please and thank you!

Hey misiaizeska.

What kind of techniques are taughlt in your course? I'm guessing it's pre-calculus because an easy way would be to use calculus.

In this kind of situation its a good idea that we know what you are being taught since other solutions may confuse or get you into trouble with your marks.