You throw a volleyball upward with an initial vertical velocity of 38.4 feet per second from a building that is 18 feet tall. Use
the vertical motion model, h = -16t2 + vt + s where v is
the initial velocity in feet per second and s is the initial height
in feet, to calculate how long the volleyball will be in the air
for. Round your answer to the nearest tenth.

Time in the air: ???
seconds

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 %