Kyle estimates the weight of his dog to be 19 pounds. The actual weight of the dog is 13 pounds. Calculate the percent of error, rounding to the nearest whole percent.

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.