Negative Integer Exponents Practice

To rewrite \( 15^{-38} \) using positive exponents only, we can use the property of negative exponents, which states that \( a^{-n} = \frac{1}{a^n} \).

Applying this to \( 15^{-38} \):

\[
15^{-38} = \frac{1}{15^{38}}
\]

So, the expression with positive exponents only is:

\[
\frac{1}{15^{38}}
\]