Some companies who make those annoying phone calls to try to sell you something generate the phone numbers randomly. Given that ten-digit phone numbers NNN-NNN- can't have a 0, 1, or 9 as the first digit nor can it have 1 or 9 as the second digit. How many different phone numbers are possible?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

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.