Answer
34090
Work Step by Step
Using significant figure rules and order of operations:
Step 1:
$(0.0045 × 20000.0) + (2813 × 12)$
Simplify what is in the parentheses to the proper significant values using multiplication/division significant figure rules.
$(90.) + (3.4 × 10^{4})$
Step 2:
Add them together using addition/subtraction significant figure rules.
The lowest decimal place is no decimal place, and therefore the answer is:
34090
