The distance traveled by some moving object is given by the formula D(x) = (x3 -6)/x2, where x is time in milliseconds. What is the instantaneous velocity of the object at the second millisecond? 4. Given f(x) = sin(4x), find the derivative of f(x) when x = " 5. Differentiate x2/3-y2/3 - 3 implicitly with respect to x and evaluate the derivative at (8, 1). =