Simplify completely expressing your answer with positive exp

Simplify completely expressing your answer with positive exponents only. (3b^2 b^-5)^3/b^3 (b notequalto 0) a) 27/b^12 b)9/b^19 c) 1/9b^12 d) -27b^69 e)-9b^24

Solution

To Simplify the given expression with positive exponents

As power can add if bases are same So b²b^-5 = b^(2-5) = b^-3

={(3b^-3)³} / b³

= 27b^-9/b³

= 27/b¹²

So my answer will be A