Question

subtract the following numbers, and give your answer with the correct number of significant figures. 1387.11 - 928.321 - 58 = ______
a 400.789
b 400.7
c 400.7892
d 400.78
e 401

Explanation:

Step1: First subtraction

$1387.11 - 928.321=458.789$

Step2: Second subtraction

$458.789 - 58 = 400.789$

Step3: Rounding to correct significant - figures

The number 58 has the least number of decimal places (0 decimal places). When subtracting, we round the final answer to the same number of decimal places as the number with the least decimal places in the values being subtracted. So, 400.789 rounds to 400.7.

Answer:

B. 400.7