Calculus Problem PLEASE HELP

Question

Find the maximum profit if the revenue and cost functions are given by the following equations:

R = 220x - x² and C = 90x +2200

Answer 1

Profit = Revenue - Costs

= 220x - x^2 - 90x - 2200.

To find maximum set derivative equal to 0

220 - 2 * x - 90 = 0

Solving for x

x = 130 / 2

Using this value of x in the expression for profit gives

Max profit = $2025