As shown in the diagram, a ship sails 16 nautical miles east from a harbor. it then sails 18 nautical miles in the direction of n 55° e. how far is it from the harbor to the nearest nautical mile?

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0