What is the range of data

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

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

What would the rule be for the reflection of y=-3