Question

derivative help

Answer 1

A 13ft ladder is leaning against a house when its base starts to slide away. By the time the base is 12ft from the house the base is moving at the rate of 5ft/sec b) at what rate is the area of the triangle formed by the ladder, wall, and ground changing at that moment

Answer 2

In part a I found da/dt (height change) to be 12 ft/sec

Answer 3

I got it nevermind forgot for A=1/2(bh) when you do the derivative you do the product rule