Question

http://prntscr.com/4zshcy

Answer 1

umm i suck at maths but imma guess

Answer 2

-5

Answer 3

cause you need to get it to 4 by -3+-5-1

Answer 4

i dunno i hate math

Answer 5

\[\frac{ 5^8 }{ (5^{-4})^{-3} } =5^8 \times (5^{-4})^{3} = 5^8 \times 5^{-12} = 5^{-4}\]
or
\[\frac{ 5^8 }{ (5^{-4})^{-3} } =\frac{ 5^8 }{ 5^{12} } =\frac{ 1 }{ 5^{4} } = 5^{-4}\]

so the missing exponent is -4