The area of the base is Pi in.2 The circumference of the base is Pi in. The area of the lateral surface is Pi in.2 The surface area is Pi in.2

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.