To convert the expression \( 14^{-7}/9^{-13} \) into an equivalent expression with only positive exponents, we will apply the property of negative exponents:
- Recall that \( a^{-n} = \frac{1}{a^n} \), and that \( \frac{a^{-m}}{b^{-n}} = \frac{b^n}{a^m} \).
Applying this property to our expression \( 14^{-7}/9^{-13} \):
\[ \frac{14^{-7}}{9^{-13}} = \frac{1}{14^7} \cdot 9^{13} \]
This can also be expressed as:
\[ \frac{9^{13}}{14^7} \]
Thus, the equivalent expression with only positive exponents is:
\[ \frac{9^{13}}{14^{7}} \]
Now, looking at the provided responses, the correct equivalent expression is:
Start Fraction \( 9^{13} \) over \( 14^{7} \) End Fraction
So the answer is:
Start Fraction \( 9^{13} \) over \( 14^{7} \) End Fraction