To subtract the numbers in scientific notation, we first need to express them with the same exponent if necessary.
The numbers we want to subtract are:
- \(4.66 \times 10^{-5}\)
- \(7.34 \times 10^{-7}\)
First, we need to convert \(7.34 \times 10^{-7}\) into the same exponent as \(4.66 \times 10^{-5}\).
To do this, we will express \(7.34 \times 10^{-7}\) with an exponent of \(-5\): \[ 7.34 \times 10^{-7} = 0.0734 \times 10^{-5} \]
Now we can perform the subtraction: \[ 4.66 \times 10^{-5} - 0.0734 \times 10^{-5} = (4.66 - 0.0734) \times 10^{-5} = 4.5866 \times 10^{-5} \]
Therefore, the answer is: \[ \boxed{4.5866 \times 10^{-5}} \]