318.9 in scintific notation

Scientific notatino is

(number that is greater than or equal to 1 and less than 10) times (10^x)

so

318.9

we need to make it less than 10

move decimal 2 places to left

3.189

to make it the same number, we multipl it by 10^2 to make it go back

scientific is

3.189 times 10^2