After the engine is cut at t = 0, a boat coasts for a while before stopping. The distance...

After the engine is cut at t = 0, a boat coasts for a while before stopping. The distance D it travels over t sec can be modeled by D(t) = 60 − . If the boat comes to a complete stop after traveling 59 ft, use a graphing calculator to determine the time required to stop. Round your answer to the nearest tenth.