Question

express 549000000 in scientific notation. 5.49 x 10^(-8) 549 x 10^6 549 x 10^8 5.49 x 10^8 54.9 x 10^(-7)

Explanation:

Step1: Recall scientific - notation form

Scientific notation is $a\times10^{n}$, where $1\leqslant|a|\lt10$ and $n$ is an integer.

Step2: Move the decimal point

For the number 549000000, move the decimal point 8 places to the left to get $a = 5.49$.

Step3: Determine the exponent

Since we moved the decimal point 8 places to the left, $n = 8$. So 549000000 in scientific notation is $5.49\times10^{8}$.

Answer:

D. $5.49\times10^{8}$