The number of significant figures in 0.00386 is

Options

A. 5
B. 3
C. 6
D. 2

Answer

To determine the number of significant figures in the number 0.00386, we will follow the rules of significant figures. Here’s a step-by-step solution:

### Step 1: Identify the number
We are given the number 0.00386.

### Step 2: Apply the rules of significant figures
1. **Leading Zeros**: The zeros that precede the first non-zero digit are not counted as significant figures. In the number 0.00386, the leading zeros (0.00) are not significant.

2. **Non-Zero Digits**: All non-zero digits are always counted as significant figures. In 0.00386, the digits 3, 8, and 6 are non-zero digits.

### Step 3: Count the significant figures
- The leading zeros (0.00) are insignificant.
- The digits 3, 8, and 6 are significant.

Thus, the total number of significant figures in 0.00386 is **3**.

### Final Answer
The number of significant figures in 0.00386 is **3**.

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