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drek231 [11]
3 years ago
11

Problem page rachel purchased a prepaid phone card for $15 . long distance calls cost 23 cents a minute using this card. rachel

used her card only once to make a long distance call. if the remaining credit on her card is $11.78 , how many minutes did her call last?
Mathematics
1 answer:
MariettaO [177]3 years ago
5 0
15-11.78=3.22
3.22/0.23=14 minutes
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Answer:

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Number of questions in the examination = 10

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Probability of B's answer being correct = 0.4

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Total expected value =    11

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