Compute 4.2 × 10^3.

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Multiple Choice

Compute 4.2 × 10^3.

Explanation:
When you multiply a number by a power of ten, you shift the decimal point to the right by the exponent. Since 10^3 equals 1000, 4.2 × 10^3 = 4.2 × 1000. Move the decimal three places to the right: 4.2 becomes 4200. So the product is 4200. Multiplying by 10, 100, or 10,000 would give 42, 420, or 42,000, respectively.

When you multiply a number by a power of ten, you shift the decimal point to the right by the exponent. Since 10^3 equals 1000, 4.2 × 10^3 = 4.2 × 1000. Move the decimal three places to the right: 4.2 becomes 4200. So the product is 4200. Multiplying by 10, 100, or 10,000 would give 42, 420, or 42,000, respectively.

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