A home improvement store is analyzing the pricing of a line of lawnmowers. These are the cost and revenue
functions for a month of business, where x represents the selling price of a lawnmower:
R(X) = -2.075x2 + 768x
C(x) = -134.625x + 8,4037.5
Which selling prices result in a profit that is greater than or equal to zero?
Select all the correct answers.
120
135
285
300
335