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What is the total cost to make 7 long distance telephone calls?

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Re: What is the total cost to make 7 long distance telephone calls?

by swerve » Tue Apr 20, 2021 5:00 pm

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BTGmoderatorDC wrote: ↑
Sat Apr 17, 2021 8:32 pm
 What is the total cost to make 7 long distance telephone calls?

(1) The length of each call was at least 2 minutes.
(2) The rate for long distance calls is $0.32 per minute


OA E

Source: Princeton Review
Form #1; cost per call not know. Not sufficient \(\Large{\color{red}\chi}\)

From #2; duration of call not know. Not sufficient \(\Large{\color{red}\chi}\)

Combining \(1 \& 2\)

We get different values at \(t \geq 2\). Not sufficient \(\Large{\color{red}\chi}\)

Therefore, E
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