Hi can anyone solve and give a explaination plz? its for a friend

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

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.