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.
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/ $14
( why did I round the cost?)
Always write the units with the numbers to avoid confusion
a division problem
6,000 hr/ 10$ = 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