How many significant figures are contained in the following measurement? 
3,482,005 mg 

• A. 0
• B. 5
• C. 6
• D. 7
• E. infinite

Answer: (D)

Verified step by step guidance

1. Identify the rules for determining significant figures: All non-zero digits are significant, zeros between non-zero digits are significant, and trailing zeros in a decimal number are significant.
2. Examine the given measurement: 3,482,005 mg.
3. Count each digit in the number: Start from the leftmost non-zero digit to the rightmost non-zero digit.
4. Recognize that all digits in 3,482,005 are non-zero or zeros between non-zero digits, making them all significant.
5. Conclude that the measurement 3,482,005 mg contains 7 significant figures.