How many significant figures are in the number 1.89 * 10³? A) 1 B) 2 C) 3 D) 4 E) 5

Question

Quizplus · Accepted Answer

The significant figures in a number are the digits that carry meaning contributing to its measurement resolution. In the given number, there are three non-zero digits (1, 8, and 9) and two additional digits (1 and 0) that are between non-zero digits, which also count as significant figures. Therefore, there are a total of 3 + 2 = 5 significant figures. However, the final "S" is not considered as part of the number and does not affect the significant figures. Therefore, the answer is C) 3.

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