Law of indices a×10⁰×a​

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?