NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h ( t ) = − 4.9 t 2 + 349 t + 290 . Assuming that the rocket will splash down into the ocean, at what time does splashdown occur? The rocket splashes down after___ seconds. How high above sea-level does the rocket get at its peak? The rocket peaks at___ meters above sea-level. fill in the blanks