Profit Function for Producing ThermometersThe 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. (Enter your answer using interval notation.)

P(x) = 0.002x² + 8x 5,000

Increasing:

Decreasing: