You are standing 15 feet away from your friend's apartment building and look to see your friend at an angle of elevation of 72º. How high up is your friend?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

27 is what percent of 108? 27 is % of 108

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees