Question

State the following in scientific notation to 3 significant digits.

12340000

00012340

10101010

Answer 1

Why don't you give it a try, then I see how i goes?

Answer 2

Or let me take the first one:
there are no zeros before 1 so the significant digits starts from there. We take 3 significant digits and therefor get:
\(1.23 \times 10^{7 }\)