.Last year, Tanique used 1,500 gallons of water to fill his swimming pool. This year, Tanique uses 1,200 gallons of water to fill his pool. What is the percent of decrease in the number of gallons of water? Round to the nearest tenth if necessary. 20 %
40 %
60 %
80 %

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %