The area is given by A=LW
Therefore, by the product rule:
I am asked to find the rate of change of the area of a rectangle, given it's length is 15 ft, and increasing at 3 ft/sec, and it's width is 6 ft, increasing at 2 ft/sec.
Rate of change of the area (dA) should just be the product of the other two rates (dx*dy) right? or am I missing something? Please help.