lesheaux
lesheaux
15.09.2021 • 
Mathematics

Virgin Mobile offers a cell phone plan that charges 30 dollars per month for up to 500 minutes of use, plus 10 cents for each text message (source: www.virginmobile.com). Assuming that a user does not exceed the
monthly 500 minutes of phone time, find a function that describes the total cost of using the phone for one
month as a function of the number of text messages, t.

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