Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10
. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
Step-by-step explanation: This is the most common answer choice [majority of the time] because of the face that they carry so much weight, and because whenever you are in doubt, you have nothing to do but guess.