Question

6. The population of a town is 680 000 correct to the nearest 10 000. Write down

(a) The least possible population of the town.
(b) The greatest possible population of the town.​

Answer 1

a) 675 000

b) 685 000

Explanation:

The population of a town is 680 000 correct to the nearest 10 000.

a) To find it lower bound, we level of accuracy by 2 and then subtract from 680 000

The lower bound is:

680 000-5000=675,000

Therefore the least possible population of the town is 675 000

b) We repeat the same process to find the upper bound

680 000+5000=685,000