by Joyce
(west monroe louisiana usa)
How much does it cost to copy 4,757 pages if the cost is as following?
Pages 1-25 cost 1.00 each.
Pages 26-500 cost 50 cents each.
Pages 501-finish cost 25 cents each
Solution
The key to this problem is to know how to find the number of pages.
How many pages from pages 1-25 ?
25 - 1 + 1 = 25
So from pages 1-25, there are 25 pages.
For these pages, the cost of each page is 1 dollars.
25 × 1 = 25 dollars
How many pages from pages 26-500 ?
500 - 26 + 1 = 475
So from pages 26-500, there are 475 pages.
For these pages, the cost of each page is 50 cents or 0.50 dollar.
475 × 0.50 = 237.5 dollars
How many pages from pages 501-4757 ?
4757 - 501 + 1 = 4257
So from pages 500-4757, there are 4257 pages.
For these pages, the cost of each page is 25 cents or 0.25 dollar.
4257 × 0.25 = 1064.25 dollars
The total cost is 25 + 237.5 + 1064.25 = 1326.75 dollars
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