Math& 15 1 Names: Derivative Practice 0. A tank of water has started leaking. The function f(t) gives us the volume (in cubic meters of water left in a tank t minutes after the leek formed. Explain what f(3) : 3000 and f '(3) : -60 tell us about the water in the tank. Find the derivative of the following functions 1. f(x)=x3 4x2 8x+20 2i foam/2H5 x3 +4x4 3. f(x)=35 4. f(x)=8 5. Find the equation for the line tangent to x) : 5x3+3x2 at the point (-1,-2)