# What is the sum of $5.3 \times 10^{5}$ and $3.8 \times 10^{4}$ ? A. $4.33 \times 10^{4}$ B. $5.68 \times 10^{5}$ C. $9.1 \times 10^{9}$ D. $9.1 \times 10^{5}$
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Answer

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Step 1
I'll solve this step by step using the precise LaTeX formatting guidelines:

Step 2
: Identify the numbers

- First number: $$5.3 \times 10^{5}
- Second number: 3.8 \times 10^{4}

Final Answer

B. 5.68 \times 10^{5}