Billy throws a ball upward from his apartment balcony and the ball falls to the ground below. The height of the ball above the ground in feet is modeled by the quadratic function h(t) = -16t 2 +32t+48, where t is the time in seconds that the ball is in the air. What is the total time that the ball was in the air?

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