Final answer:
To round 7.3482 to three significant digits, we round the digit in the fourth decimal place up to the nearest whole number. Thus, the answer is 7.35.
Step-by-step explanation:
To round 7.3482 to three significant digits, we start by looking at the digit in the fourth decimal place, which is 8. If this digit is 5 or greater, we round up the previous digit. Since 8 is greater than 5, we round up the 4 to 5. Therefore, rounding 7.3482 to three significant digits gives us 7.35.