How many significant figure are there in each of the following numbers?
(i) 6.005
(ii) `6.022xx10^(23)`
(iii) 8000
(iv) 0.0025
(v) `pi`
(vi) the sum `18.5+0.4235`
(vii) the product `14xx6.345`.

Explanation

To determine the number of significant figures in each of the given numbers, we can follow these steps:

### Step-by-Step Solution:

**(i) 6.005**
- All non-zero digits (6, 5) are significant.
- The zeros between non-zero digits (0, 0) are also significant.
- Therefore, the number of significant figures is **4**.
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