Express the following to four significant figure:
i. `6.58768 xx 10^(5)` ii. 8.35783`
iii. 98.2350 iv. 0.003586
v. 90000

Explanation

To express the given numbers to four significant figures, we will follow the rules of significant figures, which include identifying the significant digits and rounding appropriately. Here is the step-by-step solution for each part of the question:

### i. \( 6.58768 \times 10^5 \)

1. Identify the significant figures: The digits in \( 6.58768 \) are significant.
2. Count the first four significant figures: \( 6.587 \).
3. Look at the next digit (7) to determine if we round up: Since 7 is greater than 5, we round up.
4. Therefore, \( 6.58768 \) rounded to four significant figures is \( 6.588 \).
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