PLEASE HELP I POSTED THIS QUESTION LIKE 20 TIMES. (Devin and Edward race in 110 meters hurdles for their school. Devin's best time is 16 seconds. Given that Devin's best time is seven-tenths of Edwards best time, write an equation for Edwards best time.)​

Zed is making a centerpiece for his dining room table by putting sand in a cube-shaped vase. the vase is 0.25 meters in length, width, and height. he bought 25 kg of sand. assume the density of dry sand is 1,602 kgm3. what is the volume of the sand that zed purchased? the volume of the sand is approximately m3. enter your answer as the number that correctly fills in the blank in the previous sentence. if necessary, round your answer to six decimal places, like so: 42.536475