To find the total storage of the mobile phone after purchasing the additional bytes, we need to add the original storage (1.28 x 10^11 bytes) to the additional storage (384,000,000,000 bytes).
First, let's convert the additional storage into scientific notation.
384,000,000,000 bytes can be expressed as: \[ 384,000,000,000 = 3.84 \times 10^{11} \text{ bytes} \]
Now, we can add the two amounts together:
1.28 x 10^11 + 3.84 x 10^11
When adding these numbers, since they are in the same power of ten, we simply add the coefficients:
- Coefficient addition: \(1.28 + 3.84 = 5.12\)
Now we can combine this with the power of ten:
- Total storage: \(5.12 \times 10^{11} \text{ bytes}\)
Thus, the total storage of the mobile phone after buying the additional bytes is: \[ \boxed{5.12 \times 10^{11}} \text{ bytes} \]