Question

If the exponent of a number in scientific notation is ______, then to get the number in standard notation, the decimal point is moved to the ______.

• A. Both A and C
• B. negative , right
• C. positive, right
• D. negative, left

Answer 1

The correct option is A Both A and C

Detailed step-by-step solution:

• If the exponent of a number in scientific notation is positive, then to get the number in standard notation, the decimal point is moved to the right. For example, $3.434\times {10}^2=3.434\times 100=343.4$, the decimal point is moved to the right as the exponent of $10$ is positive.
• If the exponent of a number in scientific notation is negative, then to get the number in standard notation, the decimal point is moved to the left.

For example, $3.434\times {10}^{-2}=3.434÷100=0.03434,$ the decimal point is moved to the left as the exponent of $10$ is negative.

➡Option D is correct.