Can someone help 12 points on the line

The volume of a cube is 8 in to the 3rd power. how long is each side?

Guys i really need or i have to stay late up night

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?