Which parachute has a slower decent a parachute that falls 10 feet in 4 secounds or one that 12 feet in 6 secounds

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?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)