Final answer:
The value of the expression 8.3 times 10⁴-2.5 times 10³-1.9 times 10⁴ written in scientific notation is 5.8 times 10⁷-1.9 times 10⁴.
Step-by-step explanation:
To write the expression in scientific notation, we need to multiply and subtract the values first. The expression 8.3 times 10⁴-2.5 times 10³-1.9 times 10⁴ can be simplified as (8.3-2.5 times 10³) times 10⁴-1.9 times 10⁴. Performing the subtraction within the parentheses, we get (5.8 times 10³) times 10⁴-1.9 times 10⁴. Finally, multiplying both terms by 10⁴ gives us 5.8 times 10⁷-1.9 times 10⁴. The simplified expression written in scientific notation is 5.8 times 10⁷-1.9 times 10⁴.