To calculate the total storage of your mobile phone after purchasing the additional bytes, you can add the two amounts together.
- Original storage: \( 1.28 \times 10^{11} \) bytes
- Additional storage: \( 384,000,000,000 \) bytes, which is \( 3.84 \times 10^{11} \) bytes in scientific notation.
Now, adding these two values:
\[ 1.28 \times 10^{11} + 3.84 \times 10^{11} = (1.28 + 3.84) \times 10^{11} = 5.12 \times 10^{11} \]
So the total storage of your phone after buying the additional bytes would be \( 5.12 \times 10^{11} \) bytes.
Thus, the correct response is:
5.12×10¹¹