Respuesta :

answer is B most def i already worked the problem out 
Since k^(-a) = 1/k^a,

m^(-4) = 1/m^4 = 1/m x 1/m x 1/m x 1/m

Also 1/5^(-4) = 5^4 = 5 x 5 x 5 x 5

The answer is first one,
1/m.1/m.1/m.1/m = 5.5.5.5