Okay i really need someones urgently with the image attached i'm horrible at mathmatics

and if you could explain it like this,
(c ) 0.36 = 36/100
36/100 = 18/50
18/50 = 9/25

Select the correct answer. what is the surface area of the victory podium shown here? include all surfaces of the podium, including the bottom. a. 61.5 square feet b. 61.75 square feet c. 65.25 square feet d. 69 square feet

What are “like terms”? why can we only add like terms?

Asap! i'm not good math and i'm lost.