Salma purchased a prepaid phone card for $15 long distance calls cost 6 cents a minute using this card. salma used her card only once to make a long distance call. if the remaining credit on her card is $13.14 how many minutes did her call last?

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

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?