Im dumb asfff so please help me

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)