Question

write 0.1855 in scientific notation.

Explanation:

Step1: Recall scientific notation rules

Scientific notation is of the form \( a \times 10^n \), where \( 1 \leq |a| < 10 \) and \( n \) is an integer. For a number less than 1, we move the decimal point to the right until we get a number between 1 and 10, and the exponent \( n \) is negative (equal to the number of places we moved the decimal).

Step2: Move the decimal point

For \( 0.1855 \), we move the decimal point 1 place to the right to get \( a = 1.855 \). Since we moved the decimal 1 place to the right, \( n=- 1 \).
So, \( 0.1855 = 1.855\times10^{-1} \)

Answer:

\( 1.855\times10^{-1} \)