How do I calculate which light bulb is the better buy
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How do I calculate which light bulb is the better buy

[From: ] [author: ] [Date: 12-05-28] [Hit: ]
the better choice?I thought that if I found out how many hours I get for $1 in each case, then Id have my answer- But Im not sure how Id go about calculating that.a division problem6,you do 10,( why did I round the cost?......
There are two 15W fluorescent light bulbs:
One is $13.99 and lasts for 10,000 hours
The other is $9.99 and lasts for 6,000 hours

How do I calculate which one is, in the end, the better choice?
I thought that if I found out how many hours I get for $1 in each case, then I'd have my answer- But I'm not sure how I'd go about calculating that.

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since they both have the same rating in watts you are buying hours of life per dollar

a division problem
6,000 hr/ 10$ = 600 hours per dollar

you do 10,000 hours/ $14

( why did I round the cost?)

Always write the units with the numbers to avoid confusion
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