Answer:
To convert 0.00212 into scientific notation, follow these steps:
Move the decimal 3 times to right in the number so that the resulting number, m = 2.12, is greater than or equal to 1 but less than 10
Since we moved the decimal to the right the exponent n is negative
n = -3
Write in the scientific notation form, m × 10n
= 2.12 × 10-3
Therefore, the decimal number 0.00212 written in scientific notation is 2.12 × 10-3 and it has 3 significant figures.
