Sierra is working as a costume designer, creating hats for a movie set in the 1930's. Each of the hats will have a ribbon around the hat that needs to be 6 inches longer than the circumference of the hat. If the diameter of the hat is three inches, how much ribbon will she need for each hat? Round your answer to the nearest tenth.

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