Simplify -(2xy^3)^-5

A: -32x^5y^15
B: -32/x^5y^15
C: -1/32x^5y^15
D: -1/32x^4y^2

I have a good understanding of Exponents, its just that I don't get this one. I feel like it is C but at the same time I feel like it is B. I got C though but I don't understand how they got -1 on top. I know that D and A are out. Please help!

1 answer

-1/(2xy^3)^5

-1/(32x^5y^15)

C is correct.