On a dvd, information is stored on bumps that spiral around the disk. there are 73,000 ridges (with bumps) and 73,000 valleys (without bumps) across the diameter of the dvd. what is the diameter of the dvd in centimeters? round your answer to the nearest whole number.

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.