Answer:
10,350.98
Explanation:
The decimal number is the sum of the terms of the expression.
Sum
(1×10,000) +(3×100) +(5×10) +(9×1/10) +(8×1/100)
= 10,000 +300 +50 +0.9 +0.08
= 10,350.98
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Additional comment
If you can't do this in your head, you can input the expression to your calculator, and it will give this same result.