Using the rules of significant figures,calculate the following: (2.335 + 7.026)÷ 2.57 = _____
A) 3.642
B) 3.6424
C) 3.6
D) 3.64
E) 3.64241

Question

Quizplus · Accepted Answer

- First step is to perform the addition inside the parenthesis: 2.335 + 7.026 = 9.361
- Now we divide 9.361 by 2.57. According to significant figures, the answer should have the same number of decimal places as the number with the fewest decimal places, which is 2.57 (it has 2 decimal places). 
- After performing the division, we get: 3.63667820069
- Rounding this to 3 decimal places (to match the fewest decimal places in the original numbers), we get: 3.637 
- Since we can only report 3 significant figures (as dictated by the number with the fewest significant figures, which is 2.57), we round the answer to 3.64. 
- Therefore, the best choice is D) 3.64.

Using the Rules of Significant Figures,calculate the Following: (2