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The highest common factor of 132 and 220

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5