## Algebra 1: Common Core (15th Edition)

$\frac{7s(t^{3})}{5}$
Recall the equation: $a^{-n}= \frac{1}{a^{n}}$. Thus, we put $t^{3}$ in the numerator of the fraction with a positive exponent. Thus, we find that the expression becomes: $\frac{7s(t^{3})}{5}$