Question

A rectangle initially has width 4 meters and length 8 meters and is expanding so that the area increases at a rate of 9 square meters per hour. If the width increases by 20 centimeters per hour how quickly does the length increase initially?

Answer 1

A = lw

Differentiate implicitly, and you are looking for dl/dt.

Answer 2

i got 36 hbu?

Answer 3

Show all your work.

Answer 4

Already answered:
http://openstudy.com/study#/updates/527ec705e4b07e6b19114a9b