Answer
a.
$3^{-3}.3^{-1} = \frac{1}{3^{4}} = \frac{1}{81}$
b.
$\frac{5^{4}}{5} = 5^{3} = 125 $
c.
$\frac{7^{2}}{7^{5}} = 7^{-3} = \frac{1}{343} $
Work Step by Step
a.
$3^{-3}.3^{-1} = 3^{-3-1} = 3^{-4} = \frac{1}{3^{4}} = \frac{1}{81}$
b.
$\frac{5^{4}}{5} = 5^{4}.5^{-1} = 5^{4-1} = 5^{3} = 125 $
c.
$\frac{7^{2}}{7^{5}} = 7^{2}.7^{-5} = 7^{2-5} = 7^{-3} = \frac{1}{343} $
