Question

3
$frac{ {3}^{3} div 27 }{ {17}^{0} times {a}^{ - 2} }$

Answer 1

$frac{ {27}^{1} div 27 }{ {1}^{1} times {a}^{ - 2} }$ = а^2
27÷27=1.
1•a={а}^{-2}
1/а^-2=а^2