Multiple choice

How can 4,000,000 be expressed in standard index form?

  1. 4.00 × 101

  2. 0.4 × 10–5

  3. 4.0 × 106

  4. 0.04 × 105
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C Correct answer
Explanation

Standard index form (scientific notation) requires a number between 1 and 10 multiplied by a power of 10. 4,000,000 = 4 * 10^6.

AI explanation

Standard index form, also known as scientific notation, requires expressing a number as a value between 1 and 10 multiplied by 10 raised to an appropriate power. We write 4,000,000 as 4.0 multiplied by 10 six times. The result is 4.0 x 10^6.

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