2. Find the derivative of the following functions. a) f (x) = 6xVx - 7 b) 8 ( x ) -(4- 3x ) ( 5-9 ) 157 3. Determine the derivative of the following functions. 2 a) f (x) =- 8.x -3 7 -x b) g (x) =- 4x - 5x 2vx 4. The ordering and transportation cost C (in thousands of dollars) of the components used in manufacturing a product is given by C =100 20 (x x+30) , (x21) where x is the order size (in hundreds). Find the rate of change of C with respect to x when x = 20. 5. Find the derivative of the following functions. a) f (x) = (4x' -3x+9)' 6 b) g(x ) = V (x + 1 1)