A 30-pack of blank CDs costs $9.50. A 50-pack of blank CDs costs $13. How can you tell which is the better buy?
Find the unit cost of 1 CD
9.50 / 30 = $________ each
I got it after I post it. Thanks again.
You're welcome.
To determine which is the better buy, we need to compare the cost per CD in each pack. Here's how you can do it:
1. Calculate the cost per CD in the 30-pack:
Cost per CD = Total cost / Number of CDs
Cost per CD = $9.50 / 30 CDs
2. Calculate the cost per CD in the 50-pack:
Cost per CD = Total cost / Number of CDs
Cost per CD = $13 / 50 CDs
3. Compare the cost per CD in both packs:
- If the cost per CD in the 30-pack is lower than the cost per CD in the 50-pack, then the 30-pack is the better buy.
- If the cost per CD in the 30-pack is higher than the cost per CD in the 50-pack, then the 50-pack is the better buy.
- If the cost per CD in the 30-pack is equal to the cost per CD in the 50-pack, then both packs have the same value.
So, by comparing the cost per CD in each pack, you can determine which is the better buy.