The height of a helicopter above the ground is given by h = 2.95t3, where h is in meters and t is in seconds. at t = 1.95 s, the helicopter releases a small mailbag. how long after its release does the mailbag reach the ground?

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19