How many significant digits should be reported in the answer to the following calculation? (4.3 - 3.7)× 12.3 =
A)1
B)2
C)3
D)4
E)none of the above

Question

Quizplus · Accepted Answer

The calculation (4.3 - 3.7) = 0.6 has only one significant digit to the right of the decimal, and when multiplied by 12.3 (which has three significant digits), the number of significant digits in the final answer is determined by the least number of significant digits in any of the numbers used in the calculation, which is 1.

How Many Significant Digits Should Be Reported in the Answer