Three different hoses, each with its own pump, can be used to fill a swimming pool. if hose a is used by itself, the pool takes 6 h to fill. is hose b is used by itself, the pool takes 3 h to fill. if hose c is used by itself, the pool takes 2 h to fill. if all three hoses are used at the same time, how long does the pool take to fill?

What is the volume of the sphere shown below with a radius of 3?

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?