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soccergal12

  • 2 years ago

Peter's chickens got the bird flu and he is rying to stop the epidemic. He knows that the function f(t) = 300 / ( 15 - 20e^(-0.07t) ) describes the number of his chickens who are sick t weeks after the initial outbreak. (a) How many chickens became sick when the flu epidemic has began? I got -60 for my answer, which doesn't seem right (b) In how many weeks will 100 chickens be sick? i got roughly 7.3 weeks (c) What is the maximum number of chickens that will become ill?

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  1. NotTim
    • 2 years ago
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    try asking just 1 question at a time

  2. soccergal12
    • 2 years ago
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    okay, well How many chickens became sick when the flu epidemic has began?

  3. NotTim
    • 2 years ago
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    would t be 0 or 1? I dunno

  4. soccergal12
    • 2 years ago
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    well when i put in 0 i got -60 for my answer. which did not make sense

  5. soccergal12
    • 2 years ago
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    and when i put 1, i got -82

  6. NotTim
    • 2 years ago
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    eh. when did the epidemic begin?

  7. soccergal12
    • 2 years ago
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    the question never states it

  8. NotTim
    • 2 years ago
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    how'd you figure out a???

  9. soccergal12
    • 2 years ago
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    haha, i can't figure it out. that's the point. i just assumed t would be 0, and when i plugged that in, i got a negative number

  10. soccergal12
    • 2 years ago
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    uhm dont worry about it. our prof just told us we don't have to do part a. could you maybe help me with part c?

  11. NotTim
    • 2 years ago
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    eh...this doesn't look parabolic...is it? i ahvent done the math myself.

  12. NotTim
    • 2 years ago
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    but if it is, then it is at the midpoint

  13. soccergal12
    • 2 years ago
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    well the prof said to not do part a

  14. NotTim
    • 2 years ago
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    oh, talking about c there. I think a is 0...

  15. NotTim
    • 2 years ago
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    ..unless the 'parabola' has shifted...

  16. soccergal12
    • 2 years ago
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    it's okay, we don't need to wrry about it

  17. soccergal12
    • 2 years ago
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    for part c, i find the derivative and set it to 0 right?

  18. NotTim
    • 2 years ago
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    lol i forgot all about derivatives... yes.

  19. NotTim
    • 2 years ago
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    wait..is it the first or second derivative?

  20. NotTim
    • 2 years ago
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    that u should use?

  21. NotTim
    • 2 years ago
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    hey..you're doing calculus! you know of purplemath.com, calculushelp.com and khanacademy.org right?

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spraguer (Moderator)
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