All numbers in scientific notation or standard form are written in the form m × 10n, where m is a number between 1 and 10 ( 1 ≤ |m| < 10 ) and the exponent n is a positive or negative integer.
To convert 816 into scientific notation, follow these steps:
Move the decimal 2 times to left in the number so that the resulting number, m = 8.16, is greater than or equal to 1 but less than 10
Since we moved the decimal to the left the exponent n is positive
n = 2
Write in the scientific notation form, m × 10n
= 8.16 × 102
Therefore, the decimal number 816 written in scientific notation is 8.16 × 102 and it has 3 significant figures.
