When f is defined by
f(x) = sqrt(x) ,
find a so f'(a) is two times the value of f'(4).

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi