Answer:
21 rounds
Step-by-step explanation:
64x^2/3x^5/4
(4x^2/3)^3 / (81x^5)^1/4
4^3*x^2/3*3 / 3^4*1/4*x^5/4
64*x^2 / 3*x^5/4
ok, I looked at it lol ( it's A btw)
A