A cell phone company offers two different plans. Plan A
costs $80 per month for unlimited talk and text. Plan B costs $0.20 per minute
plus $0.10 per text message sent. You need to purchase a plan for your
14-year-old sister. Your sister currently uses 1,700 minutes and sends 1,600
texts each month.
(1) What is your sister’s total cost under each of the two plans?
(2) Suppose your sister doubles her monthly usage to 3,400
minutes and sends 3,200 texts. What is your sister’s total cost under each of
the two plans?
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