USA test prep add and subtract polynomials

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

What is the total area of the figure?

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w