3. A cellular company’s revenue and cost functions for selling mobile phones can be
modeled by the linear equations R = 50n and C = 10n + 300, where R represents the
revenue in dollars, C represents the cost, and n represents the number of phones sold.
How many phones will have to be sold so that the revenue is the same as the cost (this
is called the break-even point)?
How many phones will have to be sold so that the revenue is the same as the cost?