A parking garage near Cody's house is 4 stories tall. There are 68 open parking spots on the first level. There are 2 more open parking spots on the second level than on the first level, and there are 3 more open parking spots on the third level than on the second level. There are 11 open parking spots on the fourth level. How many open parking spots are there in all?

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