Algebra Problem! Please Help Me!

Question

Simplify: (5√(25)² √5)

(A) 5^(9/4)

(B) 25 8√25

(C) 5^(9/10)

(D) 3125√5

(E) None of the above

Answer 1

5² ((25)^1/2)²(5)^1/2

5² 5² 5^1/2

5⁴ 5^1/2

5^8/2 5^1/2 = 5^9/2

Answer 2

(5√25)²√5

[(5)(5)]²√5

5⁴√5

(5⁴)(5^1/2)

5^9/2