28 b please. Thanks for helping
1 answer:
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Answer:
cost per minute is 0.04
Step-by-step explanation:
Unit rates defined as the rates are expressed as a quantity of 1 such as 2 feet per second or 5 miles per hour they are called unit rates.
Given: Costs = $ 30 a month
In a month of may she used cellphone 12.5 hours.
First convert 12.5 hours in minute.
Use conversion: 1 hour = 60 minutes
then, 12.5 hours =
to find the cost per minute.
by definition;
unit rate(cost per minute ) = cost per minute.
therefore, her cost per minute is 0.04