Solve the equation with the information below. Please solve as quickly as possible.

Use the formula for instantaneous rate of change, approximationg the limit by using smaller and smaller values of h, to find the instantaneous rate of change for the given function at the given value. f(x) = 4x ; x = 3 The instantaneous rate of change for the function at x = 3 is (Do not round until the final answer. Then round to four decimal places as needed.)