Dotto started a bank account and decided to deposit 1,500/= during the first year, 2,400/= during the second year and an extra 900/= for each additional year. Find the amount he will have to deposit during the 11nth year.

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.