To rewrite the expression \( \frac{7^3}{25^{-4}} \) with only positive exponents, we'll use the property of negative exponents, which states that \( a^{-b} = \frac{1}{a^b} \).
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Rewrite \( 25^{-4} \): \[ 25^{-4} = \frac{1}{25^4} \]
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Substitute it back into the original expression: \[ \frac{7^3}{25^{-4}} = 7^3 \cdot 25^4 \]
Now, we can see that this expression \( 7^3 \cdot 25^4 \) is equivalent to the option:
73⋅254
So, the correct answer is: 7 cubed times 25 superscript 4 baseline.