Question

questions 24 & 25 prompt questions 24 & 25: determine the number of significant figures each number has. if it is an exact number, mark it as 0. 25 formula 2 points 0.00642 s answer

Explanation:

Step1: Identify significant - figure rules

Non - zero digits are always significant. Leading zeros (zeros before non - zero digits) are not significant.

Step2: Count significant digits

In the number 0.00642, the non - zero digits 6, 4, and 2 are significant. The leading zeros (the three zeros before 6) are not significant.

Answer:

3