Three problems are worked below. Choose the answer that properly describes the correct use of significant digits
I. 0.34
II. 14.3
III. 14.21 +14.2×2.0×134 14.5 28.6 1.90×10³

Question

Three problems are worked below. Choose the answer that properly describes the correct use of significant digits I. 0.34 II. 14.3 III. 14.21 +14.2×2.0×134 14.5 28.6 1.90×10³

Quizplus · Accepted Answer

I. 0.34 - Since there are no other numbers included, the final answer should have two significant digits (the 3 and the 4). 
II. 14.3 - There is only one decimal place, so the final answer should have three significant digits (the 1, the 4, and the 3). 
III. 14.21 +14.2×2.0×134 - The multiplication and addition should be done before rounding. The result of the multiplication is 38162.4, and the result of the addition is 14.21 + 38162.4 = 38176.61. The final answer should have four significant digits because the multiplication gives the most significant digits. Therefore, the final answer is 3818.

Three Problems Are Worked Below