Question

*Show your work: *The *relative positions* of an *aircraft runway* and a

*20*-*foot*-*tall control tower* are *shown* in the *figure*. The *beginning* of the *runway* is at a perpendicular distance of 300 feet from the base of the tower. If x denotes the distance an airplane has moved dow the runway, express the distance d between the airplane and the top of the control towe as a function of x.