If a man can stack 30 bricks in 6 hours at that rate how many bricks can he stack in 33hours

Write the fraction or mixed number and the decimal shown by the model

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?

Ineed with math stuff it involves graphs