Solve the following problem by carrying out the following steps in the cases: the statement of the problem, the development of the operations, verification, the interpretation and conclusion of the results. Cellphones. Mary Olson owns a business that makes and sells cell phones. The income, denoted by R (n), from the sale of cell phones is determined by multiplying the number of cell phones by the cost of each phone. Suppose that the income from the sale of “n” cell phones, with “n” less than or equal to 50, is given by the formula: R (n) = n (40 - 0.3n) where (40 - 0.3n) is the price per cell phone, in dollars. a) Determine the income when 20 cell phones are sold. b) To have an income of $ 480, how many phones must be sold?
Solve the following problem by carrying out the following steps in the cases: the statement of the problem, the development of the operations, verification, the interpretation and conclusion of the results.
Cellphones. Mary Olson owns a business that makes and sells cell phones. The income, denoted by R (n), from the sale of cell phones is determined by multiplying the number of cell phones by the cost of each phone. Suppose that the income from the sale of “n” cell phones, with “n” less than or equal to 50, is given by the formula:
R (n) = n (40 - 0.3n)
where (40 - 0.3n) is the price per cell phone, in dollars.
a) Determine the income when 20 cell phones are sold.
b) To have an income of $ 480, how many phones must be sold? (Answer this question by factoring and without using the general formula)
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