Can someone help me with this? Can u also give the full calculation

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?

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?