The number of significant figures in 45056 is

Options

A. `2`
B. `3`
C. `4`
D. `5`

Answer

To determine the number of significant figures in the number 45056, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Number**: The given number is 45056.

2. **Recognize the Non-Zero Digits**: In the number 45056, the digits are 4, 5, 0, 5, and 6. The non-zero digits are 4, 5, 5, and 6.

3. **Count the Non-Zero Digits**: All non-zero digits are considered significant figures. Here, we have:
- 4 (significant)
- 5 (significant)
- 5 (significant)
- 6 (significant)

This gives us a total of 4 significant figures from the non-zero digits.

4. **Identify the Zero**: The digit 0 is located between the non-zero digits 5 and 5. According to the rules of significant figures, any zeros that are between non-zero digits are also considered significant.

5. **Count the Zero as Significant**: Since the 0 is between the two 5s, it is significant. Therefore, we add this to our previous count:
- Total significant figures = 4 (from non-zero digits) + 1 (from the zero) = 5.

6. **Final Count**: Thus, the total number of significant figures in 45056 is 5.

### Conclusion:
The number of significant figures in 45056 is **5**.