Answer: 2.64 x 10^(-10) meters
Step-by-step explanation
Place the decimal point between the first two nonzero digits. We'll place it between the 2 and the 6.
We now have 2.64
The question is: How can we get back to 0.000 000 000 264 again?
We'll need to move the decimal point 10 spaces to the left to get back to the original value.
Therefore, 0.000 000 000 264 = 2.64 x 10^(-10)
The exponent -10 represents "move the decimal point 10 spaces to the left".
Extra info: There are 9 zeros between the decimal point and the "2" in the number 0.000 000 000 264. Take note of the spacing in the value to group up each set of 3 digits.