Final answer:
Naomi should choose Plan A with a $180 down payment and $60/week payments because it will take her 11 weeks to pay off the computer, which is one week less than Plan B with $0 down and $70/week payments.
Step-by-step explanation:
If Naomi wants to pay for her $840 computer faster, we need to compare the two payment plans.
For Plan A, Naomi would pay $180 down and then $60 per week. To find out how many weeks she would need to pay off the remaining balance, we calculate:
- Initial balance after down payment: $840 - $180 = $660.
- Number of weeks to pay off $660 with $60/week: $660 / $60 = 11 weeks.
So, for Plan A, it will take Naomi 11 weeks.
For Plan B, there is no down payment, so Naomi starts with the full $840. She would pay $70 per week:
- Number of weeks to pay off $840 with $70/week: $840 / $70 = 12 weeks.
Therefore, Naomi should choose Plan A to pay off her computer faster, as it will take less time compared to Plan B.