Here's how to get there:

1. Move the decimal point: Count the number of places you need to move the decimal point to the right to get a number between 1 and 10. In this case, you need to move it 29 places to the right.

2. Exponent: The number of places you moved the decimal point becomes the exponent of 10. Since you moved it to the right, the exponent is negative.

3. Combine: The final answer is 1.673 x 10^-29.