A pencil cup with a capacity of 80 in.3 is to be constructed in the shape of a rectangular box with a square base and an open top. If the material for the sides costs 32¢/in.2 and the material for the base costs 80¢/in.2, what should the dimensions of the cup be to minimize the construction cost?

What is the total surface area of this square pyramid?

Which letters from the table represent like terms? a and b b and c a and d b and d

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?