Question

For the following question, enter the correct numerical value up to TWO decimal places. If the numerical value has more than two decimal places, round-off the value to TWO decimal places. (For example: Numerical value 5 will be written as 5.00 and 2.346 will be written as 2.35) Number of significant figures in \( (3.20 + 4.80)\times 10^5 \) is _____

Hint:

In addition, the result should have the same number of decimal places as the term with the least decimal places.

Answer 1

Correct Answer: 3

Step 1: Perform the addition inside the bracket: \[ 3.20 + 4.80 = 8.00 \]
Step 2: Both numbers have two decimal places, so the result is written as \(8.00\).
Step 3: The expression becomes: \[ 8.00 \times 10^5 \]
Step 4: The number \(8.00\) has three significant figures. Hence, the number of significant figures is \[ \boxed{3.00} \]