Mathematics, 21.03.2021 23:10 lilGi0

Doug's Plumbing Company charges $30 up front and $50 per hour while Penny's Plumbing Company charges $192 up front and $176 per hour. Doug has decided to double both of his prices, and Penny has decided to cut both of her prices in half. After how many hours of work would it be cheaper to hire Penny?

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