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Radio and Television Ads

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Please help with the following problem.

A candidate for mayor in a small town has allocated $40,000 for last-minute advertising in the days preceding the election. Two types of ads will be used: radio and television. Each radio ads costs $200 and reaches an estimated 3,000 people. Each television ad costs $500 and reaches an estimated 7,000 people. In planning the advertising campaign, the campaign manager would kike to reach as many people as possible, but she has stipulated that at least 10 ads of each type must be used. Also, the number of radio ads must be at least as great as the number of television ads. How many ads of each type should be used? How many people will this reach?

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This solution helps with radio and television ads.

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The manager cannot spend more than $40,000 but can spend less.
Let R = a radio add, and T = a television ad.

Therefore, considering the cost of each type of ad, the following is true:

200R + 500T can be equal to or less than 40,000

But, the manager wishes ...

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