I was searching for Noah's first word on our blog (I found his first signed word: please, but I couldn't find his first spoken word) because Faith has started talking a little, and I don't know exactly what her first word is, probably "hi".  But, today, she has repeatedly said, "tada" when putting a bit of a puzzle together.
While searching for that, I came across an old post where I had posted some word problems for you to solve.  And today, I have another:What method is the best (considering cost) for purifying a drinking water system that occasionally gets coliform bacteria in it?  Your answer should be expressed in terms of:
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	Posted by
        Jon Daley on
        October 15, 2009, 1:22 pm
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