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July 28, 2014

July 28, 2014

Posted by **Joy** on Tuesday, July 30, 2013 at 3:48am.

- Discrete Mathematics -
**Steve**, Tuesday, July 30, 2013 at 4:35amwe need

50+10d < 30+15d

so, ...

- Discrete Mathematics -
**Joy**, Tuesday, July 30, 2013 at 4:43am50 + 10d < 30 + 15d

-10d < - 10d

50 < 30 + 5d

-30 -30

20 < 5d

/5 < 5

4 < d

Please tell me if this is the right answer.

- Discrete Mathematics -
**Steve**, Tuesday, July 30, 2013 at 4:48amLooks good to me.

If more than 4 days of rental, A is the better deal.

At d=4, A=B=90

After that, A grows more slowly than B.

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