Question

I need help guys thanks so much

Answer 1

Answer:

A.  243

Step-by-step explanation:

$81^\frac{5}{4} = (3^4)^\frac{5}{4} = 3^{4 \times \frac{5}{4}} = 3^5 = 243$

Answer 2

Answer: A

I just simplified it to 3^5, and that is also 243.