Significant Figures

Step 1: The volume of the cube is calculated as .
Step 2: .
Step 3: Rounding to the correct significant figures gives .
Step 4: Therefore, the correct answer is (E).

When adding or subtracting numbers, the result should be rounded to the least number of decimal places. Let’s analyze the numbers: - 18.0 has 1 decimal place. - 11.515 has 3 decimal places. - 13.2 has 1 decimal place. The least number of decimal places is 1, so the sum should be rounded to 1 decimal place: Rounding to 1 decimal place, the final result is 42.7.