Rewrite 9.98 × 10⁷  in standard form.

• A. 0.000000998
• B. 0.0000000998
• C. 9,980,000,000
• D. 99,800,000

Answer: (D)

Verified step by step guidance

1. Understand that standard form, also known as scientific notation, is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.
2. Identify the given number: 9.98 × 10⁷. This is already in scientific notation, where 9.98 is the coefficient and 10⁷ is the power of ten.
3. To convert this into standard form, multiply the coefficient by 10 raised to the power of 7. This means moving the decimal point in 9.98 seven places to the right.
4. Start by moving the decimal point in 9.98 one place to the right to get 99.8, then continue moving it six more places to the right, adding zeros as needed.
5. After moving the decimal point seven places, the number becomes 99,800,000, which is the standard form of the given scientific notation.