Procedure used during a
physical examination to
measure temperature, pulse,
respirations, and blood
pressure.

You would have to look in the respiratory system and find the answer and please give me a heart and all stars please!!

Explanation:

why. well in the question it said that respiration's so it basically gae you the information.

In order to solve this problem, you must know how to derive a function. You are given p(x) = -0.1x² + 80x - 60. Derive this in the first degree then you will have p'(x) = -0.2x + 80 then equate this to zero and you will have a number of units of 400. At 500 units, your profit, by substituting 500 to p(x) = -0.1x² + 80x - 60, will become 14,940.