SOLUTION: Solve the modeling problem. Cell Phone Charges: A cell phone service provides communication between two cities. If x represents the number of minutes for the call, where x > 0 , th
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Question 1089848: Solve the modeling problem. Cell Phone Charges: A cell phone service provides communication between two cities. If x represents the number of minutes for the call, where x > 0 , then the function gives the total cost of the call in dollars. Find the cost of a 7.5 minute call. Answer by EMStelley(208) (Show Source):
You can put this solution on YOUR website! We have a formula for the total cost of a call:
Remembering that x is the number of the minutes of the call, we know that a 7.5 minutes call implies that x = 7.5. So,
However, money does not contain a third decimal place, so we need to round to pennies, meaning that the cost of a 7.5 minute call would be $7.13.
