List 1/4, 5.5, 4.9, 5 from greatest to least please!

What could explain what happened when the time was equal to 120 minutes

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Which value would be a solution for x in the inequality 47-4x< 7