25. You are asked to find the area of a room that is 4.56 m long and 5.668 m wide. How many significant

figures should you show in your answer?

A. 5

B. 3

C. 7

D. 4

Option B

3

Explanation:

The two dimensions have the following significant numbers

4.56 - 3 significant numbers

5.668 - 4 significant figures

When responding, we give area as per the most precise number given hence the smallest (most precise) significant figures in these two numbers is 3. Therefore, the area will be given to 3 significant figures ie

4.56*5.668=25.84608 square meters

Area=25.8 square meters