The mexican subsidiary of thermomaster manufactures an indoor-outdoor thermometer. management estimates that the profit (in dollars) realizable by the company for the manufacture and sale of x units of thermometers each week is represented by the function below, where x ≥ 0. find the interval where the profit function p is increasing and the interval where p is decreasing.
p(x) = -0.002x^2 + 5x - 5000