Subtract `4.5xx10^(4)" from "7.9xx10^(5)` and express the result to an appropriate number of significant figures.

Explanation

To solve the problem of subtracting \(4.5 \times 10^4\) from \(7.9 \times 10^5\) and expressing the result in the appropriate number of significant figures, we can follow these steps:

### Step 1: Align the numbers for subtraction
We need to express both numbers with the same exponent for the base 10. The larger exponent is \(10^5\), so we can convert \(4.5 \times 10^4\) to the same exponent:
\[ 4.5 \times 10^4 = 0.45 \times 10^5 \]

...