Four is less than two less than a number t

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?

Find the solution of each of the following.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10