Kindly tell me the answers of these three

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?

Select all the expressions that will include a remainder.

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i