During the afternoon, an 18-foot tall tree casts a shadow 25 feet long. What is the approximate angle of elevation from the end of the shadow to the top of the tree with respect
to the ground?

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

the battle of gettysburg is considered the "high water mark" of the confederacy because it marked the greatest advance of the confederate forces against the union.