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To rewrite the expression \(\frac{1}{90^8}\) as a whole number with a negative exponent, we can use the rule for negative exponents:

\[
\frac{1}{a^n} = a^{-n}
\]

Applying this rule to \(\frac{1}{90^8}\):

\[
\frac{1}{90^8} = 90^{-8}
\]

So, the answer is:

\[
90^{-8}
\]

Would you like more details on negative exponents or have any questions?

### Related Questions
1. How would you rewrite \(\frac{1}{x^{10}}\) with a negative exponent?
2. What happens if you apply a negative exponent to a fraction?
3. How can we interpret \(10^{-3}\) in terms of decimal notation?
4. What is the rule for multiplying powers with the same base?
5. How does \((a^m)^{-1}\) simplify when using negative exponents?

### Tip
When dealing with expressions in the denominator, applying a negative exponent is a quick way to rewrite them without fractions.

Write the expression as a whole number with a negative exponent. Do not evaluate the expression: \( \frac{1}{90^8} \)

Learn how to rewrite \( \frac{1}{90^8} \) as a whole number using a negative exponent. This algebra problem covers key concepts like negative exponents, simplifying expressions, and exponent rules. Ideal for students in Grades 8-10.

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