Using the limit derivative of the derivative to find the slope of the tangent line to curve f(x)=4x^2 at x=3, what is f(3+h)?

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?