Please help I would really appreciate it.

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?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if