above the ground. The height, h(t), in metres, of the disk after launch is modelled by the function h(t) = -5t² + 30t + 12, where t is time in seconds. a) When will the disk reach the ground? b) What is the maximum height the disk reaches?

The path of a parabolic arch is given by h(d) = –0.025d2 + d, where h(d) is the height of the arch above ground, and d is the horizontal distance of the arch from the left base, both in metres. How high is the arch when it was 2 m away from the left base?

4. Aden jumped off a cliff into the ocean to show his friends that he is the bravest one of the bunch. His height as a function of time could be modeled by the function h(t) = - 16t° + 16t + 480, where t is the time in seconds and h is the height in feet. a. How long did it take for Aden to reach his maximum height?

A flare is fired from the bottom of a 240 foot deep canyon. The flares height at time t can be modeled by the function s(t) = -16t² + 128 t. a) When does the flare reach its maximum height? b) What is the maximum height the flare reaches? c) Emergency crews will see the flare once it is higher than the top of the canyon. For what period of time after launch is the flare visible?