I need help right now ! on this proportion card!

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?

What is the point slope form of a line with slope -5 that contains point (2,-1)

Qrst is a parallelogram. determine the measure of ∠q pls