One hose can fill a goldfish pond in 42 minutes, and two hoses can fill the same pond in 30 minutes. Find how long it take for the second hose alone to fill the pond.

What is the product of the radical expression. (7-2square root) (8+2 square root)

The diameter of a ball is 8 in. what is the volume of the ball? use 3.14 for pi. enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?