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Math Help - math problem

  1. #1
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    math problem

    imagine five mold spores on a piece of cheese in your refrigerator. suppose that the spores triple in number every hour

    A) make a table showing the mold spore count for the five hours?

    B) write an algebraic model for this situation. clearly define your variable. explain how the model relates to the table

    C)you can visually detect the mold when there are one million spores. how long does it take you to see the mold? document your reasoning in a clear and organized manner?

    hope you could help me
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  2. #2
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    A) Well if you start with 5, and they triple with every hour then just write out a table of how many there are after 0, 1, 2, 3, 4 and 5 hours. E.g 0 hours - 5, 1 hour - 15.

    B) So it's asking you to create a formula to describe the growth of the mould. I'll give you a hint, it involves using n (the time in hours) as a power, since the growth is exponential.

    C) If you can create this formula it's easy, just plug in that it equals 1,000,000 and you should be able to find n.

    See how you get on.
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  3. #3
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    so it will be like y=5(3)^n or y=3(5)^3...

    im stuck ryt now..


    dunno if i did it ryt
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  4. #4
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    Quote Originally Posted by kenkarylle5 View Post
    so it will be like y=5(3)^n or y=3(5)^3...

    im stuck ryt now..


    dunno if i did it ryt
    Yeah that's right,  y=5(3^n). Just think about it, after 1 hour there's (3*3) * 5, after two hours (3*3*3) * 5...
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  5. #5
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    ahahahaha thank you so muchhh

    appreciate it...
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  6. #6
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    Quote Originally Posted by kenkarylle5 View Post
    ahahahaha thank you so muchhh

    appreciate it...
    Anytime, you can press 'Thanks' if you like
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