A cell phone company offers two different plans. Plan A costs $85 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 teenage sister. Your sister currently uses 1,750 minutes and sends 1,650 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 3,500 minutes and sends 3,300 texts. What is your sister's total cost under each of the two plans?

1) Plan A total cost = $85

Plan B total cost = $515

2) Plan A total cost = $85

Plan B total cost = $1030

Explanation:

given data

Plan A costs = $85

Plan B costs = $0.20 + $0.10 per text

sister use = 1,750 minutes and 1,650 texts

solution

we get here sister's total cost under each of the two plans

Plan A total cost = $85

Plan B total cost = $0.20 * 1,750 minutes + $0.10 * 1,650 texts

Plan B total cost = $515

and

when sister doubles her monthly usage

Plan A total cost = $85

Plan B total cost = $0.20 * 3,500 minutes + $0.10 * 3,300 texts

Plan B total cost = $1030