Aflare is launched from a boat. the height, , in meters, of the flare above the water is approximately modelled by the function, where is the number of seconds after the flare is launched. how many seconds will it take for the flare to return to the water?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?