Suppose a book has 100 names listed in each column, with 5 columns per page. The book has 200 pages. How many books are needed to list all the people in a population of 200 million?

2,000

Step-by-step explanation:

We know that 100 × 5 = 500, so one page has 500 names on it, we can now then infer that each book has 100,000 names on it because we do 500 × 200.

So knowing that there is 100,000 names per book we now then do 100,000 × 2,000 which equals 200,000,000, so we need to do 2,000 books to store the names of 200 million people. Hope this helps.

a

step-by-step explanation:

i used to know how to do this in 7th but i forget easily

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