Question

Express the decimal number 0.0210 in scientific notation.

1) 2.10 × 10⁻²
2) 2.10 × 10⁻³
3) 2.10 × 10⁻¹
4) 2.10 × 10⁻⁴

Answer 1

The decimal number 0.0210 in scientific notation is 2.10 × 10⁻².

Step-by-step explanation:

To express the decimal number 0.0210 in scientific notation, we follow a simple procedure. We need to shift the decimal point to make the number between 1 and 10. In this case, we move the decimal point two places to the right to get 2.10. Since we moved the decimal to the right, the exponent will be negative. The number of places we moved the decimal point is the absolute value of the exponent.

Thus, the decimal number 0.0210 in scientific notation is 2.10 × 10⁻², which corresponds to option 1) 2.10 × 10⁻².