Need exponent help and explanation! please help!

Ok, a new question, d^-3 for d= -2

If im correct its -1/8, but im still not sure

Me can help!! Me is the smartest cookie in the world!!

$a^5 b^{-6}\\ =\dfrac{a^5}{b^6}$

$\boxed{\color{olive}{a^{-x} \\=\dfrac{1}{a^x}}}$

Thanks alot! That is what i thought the answer was but i wasn't sure.... nor am i sure about some other things, and you are you smartest cookie in the world :)

yes that is the answer -1/8 or -0.125