Answer: The number we get is 73
Explanation:
We are given:
A number having value of 72.8
The rules that are used to round off a number to the required number of significant figures are:
- If the rightmost digit to be removed is more than 5, the preceding number is increased by one.
- If the rightmost digit to be removed is less than 5, the preceding number is not changed.
- If the rightmost digit to be removed is 5, then the preceding number is not changed if it is an even number but it is increased by one if it is an odd number.
The given number has decimal place more than 5. So, the preceding number will increase by 1.
Hence, the number we get is 73
