The speed v of a satellite can be found from the equation v = side of the equation and then solve for v. v= GmM m Simplify the right (Simplify your answer. Type an exact answer, using radicals as needed.) The height h (in feet) of a fireworks shell shot vertically upward as a function of time t (in s) is h(t)=-16t + 40t+3. How long should the fuse last so that the shell explodes at the top of its trajectory? The fuse should last for (Simplify your answer.) second(s).