Question

The revenue and cost functions, both in dollars, for the production and sale of x TVs are given as $R(x) = 110x - 0.2x^2$ and $C(x) = 3,230 + 15x$, respectively. (a) Find the value(s) of x where the graph of R(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.) (b) Find the profit function in terms of x. (Note: Profit is revenue minus costs.) P(x) = (c) Find the value(s) of x where the graph of P(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.)

          The revenue and cost functions, both in dollars, for the production and sale of x TVs are given as $R(x) = 110x - 0.2x^2$ and $C(x) = 3,230 + 15x$, respectively.
(a) Find the value(s) of x where the graph of R(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.)
(b) Find the profit function in terms of x. (Note: Profit is revenue minus costs.)
P(x) = 
(c) Find the value(s) of x where the graph of P(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.)

The revenue and cost functions, both in dollars, for the production and sale of x TVs are given as R(x) = 110x - 0.2x^2 and C(x) = 3,230 + 15x, respectively.
(a) Find the value(s) of x where the graph of R(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.)
(b) Find the profit function in terms of x. (Note: Profit is revenue minus costs.)
P(x) =
(c) Find the value(s) of x where the graph of P(x) has a horizontal tangent line with correct units. (Enter your answers as a comma-separated list. Round your answers to the nearest integer. If an answer does not exist, enter DNE.)

Added by Jeffrey A.

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