I need help with math it easy but im a lil slow so help

Can (3,5 and square root 34) be sides on a right triangle?

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 trigonometric ratios sine and secant are reciprocals of each other