Wednesday

March 4, 2015

March 4, 2015

Posted by **Jemima** on Thursday, July 19, 2012 at 6:21pm.

(a) What was the initial fruit fly population in the experiment?

flies

(b) What was the maximum fruit fly population that could be expected under this laboratory condition?

flies

(c) What was the population of the fruit fly colony on the 14th day?

flies

(d) How fast was the population changing on the 14th day?

flies/day

- Calculus -
**Reiny**, Thursday, July 19, 2012 at 6:32pmI don't see an "exponential model below" .

- Calculus -
**Jemima**, Thursday, July 19, 2012 at 6:50pmN(t)= 600/1+24e^-0.21t

- Calculus -
**Reiny**, Thursday, July 19, 2012 at 9:49pmI am sure you meant

n(t) = 600/(1 + 24e^-.21t )

a) let t=0, N(0) = 600/(1+24e^0) = 600/25 = 24

b) As t gets larger e^-.21t gets smaller

e.g. if t = 20, e^-4.2 = .015

so 24e^-.21t gets smaller

and our formula approaches 600/(1+0) = 600

so the maximum would be 600

c) sub in t=14

N(14) = 600/(1+24e^-2.94) = appr 264

d) N'(t) = -600(1+24e^-.21t)^-2 * 24(-.21)e^-.21t

sub in t=14

you do the button-pushing (I got 31)

- Calculus -
**Jemima**, Thursday, July 19, 2012 at 10:12pmThanks!

**Answer this Question**

**Related Questions**

math - On the basis of data collected during an experiment, a biologist found ...

calculus - The number of Drosophila fruit flies in a controlled experiment ...

calculus - The number of Drosophila fruit flies in a controlled experiment ...

algebra - Researchers use formula f(t) = Pe^rt to model the population of fruit ...

health - Which of the following is true in regard to limited data sets? A....

allied health - which of the following is true in regard to limited data sets>...

allied health - I want to say D. Not sure here Which of the following is true in...

Finite---- PLEASE HELP - A biologist finds that 32% of fruit flies have short ...

Confidentiality Health - Which of the the following statements is true in ...

Calculus - The number of bacteria after t hours in a controlled laboratory ...