(1 point) The total revenue and total cost functions for the production and sale of x x TV's are given as R(x)=120x−0.1x2 R ( x ) = 120 x − 0.1 x 2 and C(x)=3380+17x. C ( x ) = 3380 + 17 x . (A) Find the value of x x where the graph of R(x) R ( x ) has a horizontal tangent line. x x values is (B) Find the profit function in terms of x x . P(x) P ( x ) = (C) Find the value of x x where the graph of P(x) P ( x ) has a horizontal tangent line. x x values = (D) List all the x x values of the break-even point(s). If there are no break-even points, enter 'NONE'.
List of x x values =
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