A shark takes 20 minutes to swim with the current from its cave to the feeding grounds. Later, it returns against the current, taking 30 minutes. Find the speed of the shark and the current if both the trip out and the trip back are 2100 feet?

Is the product of seventeen negative numbers, positive or negative ?

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

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?