Which of the following have same significant figures?

Options

A. 0.07
B. 0.7
C. 7
D. 70

Explanation

To determine which of the given numbers have the same significant figures, we will analyze each option step by step.

### Step 1: Analyze the first number, 0.07
- The number 0.07 has a leading zero before the decimal point and a zero after the decimal point before the non-zero digit (7).
- According to the rules of significant figures, leading zeros are not counted as significant.
- Therefore, the only significant figure in 0.07 is the digit 7.
- **Significant figures in 0.07: 1**

### Step 2: Analyze the second number, 0.7
- The number 0.7 also has a leading zero before the decimal point.
- Again, the leading zero is not counted as significant.
- The only significant figure in 0.7 is the digit 7.
- **Significant figures in 0.7: 1**

### Step 3: Analyze the third number, 7
- The number 7 has no leading zeros or decimal points.
- The digit 7 itself is significant.
- **Significant figures in 7: 1**

### Step 4: Analyze the fourth number, 70
- The number 70 has a non-zero digit (7) followed by a zero.
- In this case, the zero is considered significant because it follows a non-zero digit.
- Therefore, both digits (7 and 0) are counted as significant figures.
- **Significant figures in 70: 2**

### Conclusion
- After analyzing all four numbers:
- 0.07 has 1 significant figure.
- 0.7 has 1 significant figure.
- 7 has 1 significant figure.
- 70 has 2 significant figures.
- The numbers 0.07, 0.7, and 7 all have the same number of significant figures, which is 1.

### Final Answer
The numbers that have the same significant figures are 0.07, 0.7, and 7, all with 1 significant figure.

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