Which of the following has the highest number of significant figures ?

Options

A. `0.007 m^(2)`
B. `2.64 xx 10^(24) kg `
C. `0.0006032 m^(2)`
D. `6.3200 J `

Explanation

To determine which of the given options has the highest number of significant figures, we will analyze each option step by step.

### Step 1: Analyze Option A - 0.007 m²
- The number is 0.007.
- According to the rules of significant figures, leading zeros (the zeros before the first non-zero digit) are not counted.
- The only significant figure here is '7'.
- **Significant Figures in A:** 1

### Step 2: Analyze Option B - 2.64 × 10²⁴ kg
- The number is 2.64 × 10²⁴.
- In this case, there are no leading zeros, and all digits are significant.
- The digits '2', '6', and '4' are all counted.
- **Significant Figures in B:** 3

### Step 3: Analyze Option C - 0.006032 m²
- The number is 0.006032.
- Again, leading zeros are not counted.
- The significant figures are '6', '0', '3', and '2'.
- **Significant Figures in C:** 4

### Step 4: Analyze Option D - 6.3200 J
- The number is 6.3200.
- There are no leading zeros, and all digits are significant.
- The digits '6', '3', '2', '0', and '0' are counted.
- **Significant Figures in D:** 5

### Step 5: Compare the Significant Figures
- Option A: 1 significant figure
- Option B: 3 significant figures
- Option C: 4 significant figures
- Option D: 5 significant figures

### Conclusion
- The option with the highest number of significant figures is **Option D (6.3200 J)** with **5 significant figures**.