What are all the real roots of the following polynomial?
f(x) = x^5 + 5x^4 - 5x^3 - 25x^2 +4x +20

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d.c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft