Altitude above sea level is given in positive values and below sea level is given in negative values. which situation describes a hiker in death valley stopping at an altitude of 0 feet?

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