The number of significant figure in 4.630 is

Options

A. 4
B. 2
C. 3
D. 1

Answer

To determine the number of significant figures in the number 4.630, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Non-Zero Digits**:
- The first step is to identify the non-zero digits in the number. In 4.630, the non-zero digits are 4, 6, and 3.

2. **Count Non-Zero Digits**:
- Count the number of non-zero digits identified. Here, we have three non-zero digits: 4, 6, and 3.

3. **Identify Zeros**:
- Next, we need to look at the zeros in the number. In 4.630, there is one zero at the end (after the 3).

4. **Apply the Rule for Zeros**:
- According to the rules of significant figures, any zeros that are to the right of the last non-zero digit in a number with a decimal point are considered significant. Since 4.630 has a decimal point and the zero is to the right of the last non-zero digit (3), this zero is significant.

5. **Count All Significant Figures**:
- Now, we count all the significant figures. We have three non-zero digits (4, 6, and 3) and one significant zero (0). Therefore, the total number of significant figures in 4.630 is 4.

### Conclusion:
The number of significant figures in 4.630 is **4**.

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