A fast-food restaurant determines the cost and revenue models for its
C = 0.4x + 7800, 0 ≤ x ≤ 50,000 R = 1
10,000 (69,000x − x2), 0 ≤ x ≤ 50,000
Write the profit function for this situation.
Determine the intervals on which the profit function is increasing and decreasing. (Enter your answers using interval notation.)
Determine how many hamburgers the restaurant needs to sell to obtain a maximum profit: