Which of the following expresses 2000000 in scientific notation?

• A. 20 \times 10^{5}
• B. 2 \times 10^{5}
• C. 2.0 \times 10^{7}
• D. 2 \times 10^{6}

Answer: (D)

Verified step by step guidance

1. Understand that scientific notation expresses a number as a product of a number between 1 and 10 and a power of 10, in the form \(a \times 10^{n}\) where \$1 \leq a < 10\( and \)n$ is an integer.
2. Start with the given number: 2000000. Count how many places the decimal point moves to the left to get a number between 1 and 10. For 2000000, moving the decimal 6 places left gives 2.0.
3. Rewrite 2000000 as \$2.0 \times 10^{6}\( because moving the decimal 6 places to the left is equivalent to multiplying by \)10^{6}$.
4. Check the options to see which one matches the correct scientific notation form: it should have a coefficient between 1 and 10 and the correct power of 10.
5. Confirm that \$2 \times 10^{6}$ is the correct scientific notation for 2000000, as it meets the criteria and accurately represents the original number.