Lisa paid $35 to join an online music service. If she purchases 18 songs each month at a cost of $.75 per song will be the total amount after four months.

Answer 1

First, calculate the total cost of the songs per month: $0.75/song * 18 songs = $13.50

Next, calculate the total cost of the songs after 4 months: $13.50/month * 4 months = $54

Add the initial joining fee to the total cost of the songs: $54 + $35 = $89

Therefore, the total amount Lisa will pay after four months is $89.