To subtract the numbers \(4.66 \times 10^{-5}\) and \(7.34 \times 10^{-7}\), we first need to express them in the same power of ten.
Let's convert \(7.34 \times 10^{-7}\) to a power of \(10^{-5}\):
\[ 7.34 \times 10^{-7} = 0.0734 \times 10^{-5} \]
Now we can write the subtraction:
\[ 4.66 \times 10^{-5} - 0.0734 \times 10^{-5} \]
Calculating this gives:
\[ (4.66 - 0.0734) \times 10^{-5} = 4.5866 \times 10^{-5} \]
Therefore, the answer is:
\[ \boxed{C. , 4.5866 \times 10^{-5}} \]
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