Which of the following numbers has the most significant figures?

Which of the following numbers has the most significant figures?

Correct Answer: 7.890 x 10^3

Step 1: Understand what significant figures are. Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal part.
Step 2: Look at each number given in the question. Identify the digits in each number and count the significant figures.
Step 3: For the number 7.890 x 10^3, count the digits: 7, 8, 9, and 0. This gives us 4 significant figures.
Step 4: For the other numbers, count their significant figures as well. If a number has leading zeros (zeros before the first non-zero digit), do not count those.
Step 5: Compare the counts of significant figures from all the numbers. Identify which number has the highest count.
Step 6: Conclude which number has the most significant figures based on your counts.

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