Express the following numbers in the standard form:
(i) 5985.3    (ii) 65,950    (iii) 3,430,000      (iv) 70,040,000,000

Explanation

To express the given numbers in standard form, we will follow the same method of moving the decimal point and counting the number of places it moves. The standard form is generally written as \( a \times 10^n \), where \( 1 \leq a < 10 \) and \( n \) is an integer.

### Step-by-Step Solution:

**(i) For 5985.3:**
1. Move the decimal point to the left until only one non-zero digit is to the left of the decimal.
- Move it 3 places: 5.9853
2. Count the number of places moved.
...