Abuilding casts a 50-foot shadow. alex is 5 feet tall and casts a 6-foot shadow. approximately how tall is the building?
a.24 ft
b.42 ft
c.60 ft
d.50 ft

Use ratios to solve this!

5:6 or 5/6 is the ration for Alex. 

Cross multiplication is used to solve this, so: 
6x = 5(50) 
6x = 250 
x = 250/6 
x = 41.67 which then rounds to 42 feet.

Also to your earlier question here is a screenshot of what the box should look like, and i have circled the attach file icon

You just need to add 32 to 14 and get 46.

40 & 50 in the right corner are the complementary angles as when placed in a sum (added together) they make 90°