A bag contains 16 red marbles, 9 yellow marbles, and 5 blue marbles. If a red marble is drawn, you lose $5. If a yellow marble is drawn, you win $5. If a blue marble is drawn, you win $10. It costs $0.50 to play. Should you play the game?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Is the square root of 4 plus the square root of 16 rational?