Subtract 4.66 x 10^-5 - 7.34 x 10^-7

To subtract these numbers, we must first ensure that they have the same exponent. In this case, we can convert both numbers to the same exponent by moving the decimal point to the right once on the second number:

4.66 x 10^-5 - 0.0734 x 10^-5

Now that both numbers have the same exponent, we can subtract the decimal parts:

4.66 - 0.0734 = 4.5866

Finally, we write down the answer in scientific notation:

4.5866 x 10^-5