Question

After every 10 pages of printing, the ribbon in the dot matrix printer loses about 0.5% of its ink.

a) What percent of the ink is left in the ribbon after printing
i) 100 pages

Answer 1

What is LEFT after printing is 0.995 after 10 pages.
After another 10 pages, there is 0.995^2 left.
After another 10 pages, there is 0.995^3 left.
...
What about after 100 pages?

Answer 2

Where did you get 0.995??

Answer 3

The printer loses 0.5% of its ink after printing 10 pages.
0.5% =0.005 is used, so 1-0.005=0.995 is left.

Answer 4

ohh, i see. thank you!

Answer 5

You're welcome! :)