PLEASE HELP WITH THIS QUESTION

Plz heeeeeeelp plz give me the answer

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube