The practice problems received 66 views for week 3 and 270 views for week 15. Find the average rate of change of views from week 3 to week 15. Provide a sentence with units. Problem 2 3 points Find all the points where the slope of the tangent line is horizontal to the graph of the function. f(x) = 4x2 +2x+3 Problem 3 3 points If A'(t) represents the rate at which a toxic chemical is leaked into a water supply from hour a to b explain what the following represents f: A'(t)dt. Problem 4 3 points Evaluate the following [130:2 + 4x)dx