To find the total storage of the mobile phone after adding the additional bytes, we first need to express both numbers in scientific notation:
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The original storage: \[ 1.28 \times 10^{11} \text{ bytes} \]
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The additional storage: \[ 384,000,000,000 = 3.84 \times 10^{11} \text{ bytes} \]
Now we can add these two quantities together: \[ 1.28 \times 10^{11} + 3.84 \times 10^{11} \]
To add them, we keep the powers of 10 the same: \[ (1.28 + 3.84) \times 10^{11} = 5.12 \times 10^{11} \]
So, the total storage would be: \[ 5.12 \times 10^{11} \text{ bytes} \]
Therefore, the correct answer is: 5.12×10¹¹.