The movement of a certain glacier can be modelled by [tex]d(t)=0.01t^2+0.5t[/tex] where d is the distance in metres that a stake on the glaciers has moved, relative to a fixed position, t days after measurements began. Find the rate at which the glacier is moving after 20 days.(adsbygoogle = window.adsbygoogle || []).push({});

What is the question asking for?

I got an answer by using: lim_h-0 f(a+h)-f(a)/h

and I got a final answer of 8.5 but the answer is 0.9m/day in the book !!!

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rate of movement of glacier

**Physics Forums | Science Articles, Homework Help, Discussion**