And inlet pipe on a swimming pool can be used to fill the pool and 26 hours. The drain pipe can be used in the pool in 30 hours. If the pool is 2/5 filled and then the inlet pipe and drain pipe are open, how long from that time will it take to fill the pool?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Acircular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

Compare the cost of the bike trips from the two companies shown.for both the cost in a linear function of the number of days which statements is true