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## 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...