3) You stand 100 feet from a tree. The angle of elevation from you to the top of the tree is 47º. How tall is the tree to the nearest foot?

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

combine all like terms then its just a 2 step equation

where is the option given

8 < i think

hope this !