Question

Which is true for 13.72 × 10^4?

A. The decimal point moves to the left four times when you multiply by 10^4 since four is the value of the exponent.
B. The decimal point moves to the right four times when you multiply by 10^4 since four is the value of the exponent.
C. The decimal point moves to the right after adding four zeros to the number since four is the value of the exponent.
D. The decimal point moves to the right four times when you multiply by 10^4 since four is the value of the exponent.

Answer 1

The correct answer is that when multiplying 13.72 by 10^4, the decimal point moves to the right four times because the exponent is positive. Option B is correct.

Step-by-step explanation:

When working with scientific notation and multiplying by powers of ten, the decimal point moves in the direction dependent on the sign of the exponent. For 13.72 × 10^4, since the exponent is positive, we move the decimal point to the right. Therefore, Option B is correct: The decimal point moves to the right four times when you multiply by 10^4 since four is the value of the exponent.