easy · GMAT Quant
A marketing firm determines that the cost C of a campaign depends on the number of ads a according to the formula C = a^2 - 20a + 150.
If the firm budget permits a cost of exactly 75, and a_1 and a_2 are the two possible numbers of ads that result in this cost, what is the value of a_1 × a_2?
- 75
- 20
- 5
- 15
- 150
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