Question

16 write 0.000045 in scientific notation. (1pt)

Explanation:

Step1: Recall scientific notation rules

Scientific notation is in the form \( a \times 10^{n} \), where \( 1\leq|a|\lt10 \) 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).
For \( 0.000045 \), we move the decimal point 5 places to the right to get \( 4.5 \).

Step2: Determine the exponent

Since we moved the decimal 5 places to the right, the exponent \( n=- 5 \).
So, \( 0.000045 \) in scientific notation is \( 4.5\times10^{-5} \).

Answer:

\( 4.5\times10^{-5} \)