Express the following mathematical operations in scientific notation.
(1) `(7.7xx10^(4))+(0.77xx10^(5))`
(2) `(8.7xx10^(4))-(0.77xx10^(5))`

Explanation

To express the given mathematical operations in scientific notation, we will follow these steps:

### Step 1: Solve the first operation `(7.7 x 10^4) + (0.77 x 10^5)`

1. **Identify the powers of ten**: The first term is \(7.7 \times 10^4\) and the second term is \(0.77 \times 10^5\).
2. **Convert the second term to the same power of ten**: We can express \(0.77 \times 10^5\) as \(0.77 \times 10^5 = 0.77 \times 10^4 \times 10^1 = 7.7 \times 10^4\).
3. **Combine the terms**: Now we can add the two terms:
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