Express 2,750,389 in scientific notation. ?

Question

any one know this answer i forget how to do these

Answer 1

2.750389 * 10^6

You move the decimal point to just behind the first number, and count how many places to the left you moved it, in this case 6, and therefore multiply it by 10^6.

In this example:

0.0003217

The decimal point needs to be moved 4 places to the right, which is -4 places to the left, therefore it is:

3.217 * 10^-4