To determine which expression yields the smallest number, let's evaluate each expression step by step.
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\( 10^5 \cdot 10^{-4} \): \[ 10^5 \cdot 10^{-4} = 10^{5-4} = 10^1 = 10 \]
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\( (10^{-2})^{-2} \): \[ (10^{-2})^{-2} = 10^{-2 \cdot -2} = 10^4 = 10,000 \]
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\( \frac{10^8}{10^8} \): \[ \frac{10^8}{10^8} = 10^{8-8} = 10^0 = 1 \]
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\( \frac{10^8}{10^{10}} \): \[ \frac{10^8}{10^{10}} = 10^{8-10} = 10^{-2} = 0.01 \]
Now we compare the results:
- \( 10^5 \cdot 10^{-4} = 10 \)
- \( (10^{-2})^{-2} = 10,000 \)
- \( \frac{10^8}{10^8} = 1 \)
- \( \frac{10^8}{10^{10}} = 0.01 \)
The smallest number on the number line among these results is: \[ \frac{10^8}{10^{10}} = 0.01 \]
So, the expression that leaves you with the smallest number on the number line is: \[ \frac{10^8}{10^{10}} \]