On planet Mars, an astronaut jumps off a 2.00 m high boulder onto the ground. Her height above the ground in metres as a function of time in seconds is given by h(t)=−1.89t²+2.34t+2.00 • When, to the nearest hundredth of a second, will she land on the ground?

• When, to the nearest hundredth of a second, will she reach her maximum height above the ground?

• What is her maximum height to the nearest hundredth of a metre?