7. On Mars, if you hit a baseball, the height of the ball at time : would be modelled by the quadratic function h(t) = -1.85t* + 20t +1 where t is in seconds and h(t ) is in metres. a. When will the ball hit the ground? b. How long will the ball be above 17 m? 8. The height of an arrow shot on Neptune can be modelled by the quadratic function h(t) - -5.571* +50t + 2.3 where time, t, is in seconds and height, h(t), is in metres. Use the quadratic formula to determine when the arrow will hit the surface