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LUCKY_DIMON [66]
3 years ago
11

A cell phone company charges a flat rate of $3.99 per month, with an additional charge of $0.05 per minute. How many minutes did

Casey talk on her cell phone if her monthly bill was $38.44?
Mathematics
2 answers:
sasho [114]3 years ago
6 0

Step-by-step explanation:

Monthly bill - Flat rate = $38.44 - $3.99 = $34.45.

Minutes used = $34.45 / $0.05 = 689.

Arlecino [84]3 years ago
6 0
Yellow grader thinking food real
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deff fn [24]

Since the sum of the probabilities of all possible outcomes must be 100%, we can deduce the following:

  • Cooking in under 20 minutes: 10%
  • Cooking between 20 and 30 minutes: 85%
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In fact, the probabilities of cooking in less than 20 or more than 30 sum up to 15%, which means that the remaining outcome (i.e. cooking time between 20 and 30) must complete this probability to 15, and in fact 15+85=100.

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