0.001372; The decimal point moves to the left four times when you multiply by 104 since four is the value of the exponent. 137,200; The decimal point moves to the right four times when you multiply by 104 since four is the value of the exponent.

13,720,000; The decimal point moves to the right after adding four zeros to the number since four is the value of the exponent.

1,372,000; The decimal point moves to the right four times when you multiply by 104 since four is the value of the exponent.

which is true

13.72 × 104