The bathroom shower in celia's house uses 7 gallons of water per minute. if celia installs a water saving device, the shower will use only 2 1/2 gallons of water per minute. how many gallons of water will celia save during a 12-minute shower after the water-saving device is installed

Use the distance formula to determine the distance that point q is from r on the hypotenusebased on a 2-3 ratio.i need asap !

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables