Bob the giraffe has just arrived at The Incorporated Zoo of Euclid and Pythagoras. Rian is a huge fan of giraffes, and visits the zoo as soon as his parents will let him. There is no information posted about Bob yet, but Rian wants to know how tall Bob is. Because he also loves math, Rian will use geometry and trigonometry to determine Bob's height from a viewing station. There is a viewing station 12 ft from where Bob is currently eating. Rian measures the angle of elevation from his gaze to the top of Bob's head to be 30 and the angle of depression from his gaze to the ground at Bob's feet to be 45 How tall is Bob? Give an exact answer.