Sig Figs: Calculating Answers to 1 & 2

[chemic_23]

Homework Statement

how many significant figures are there if a scientific notation is added or multiplied to a whole number, let's say


1.) 208998 + 4.7 x 10^5 =??
2.) (0.0000328) (45.9 x 10^8) =??

Homework Equations

The Attempt at a Solution

I've been thinking since last night... please help...

 

[LowlyPion]

Welcome to PF.

Would this help?
http://en.wikipedia.org/wiki/Signif...on_and_division_using_significance_arithmetic

 

[chemic_23]

thank you very much!

 

[LowlyPion]

thank you very much!

Thank Google.

Cheers.