Help on last question.. Calculus..

Question

destinyyyy · Answer

attachment

mathmale · Answer

Could you please be more specific about what kind of "help" you need?
If y ou want someone to check your work, please share your own work here.

destinyyyy · Answer

I need help solving it. Starting at step one. I didnt answer this question. I want to know how to solve it. This was on my quiz but I dont have a question like this in any of the 8 sections of homework ive done in the course so far.

anonymous · Answer

i think in part you need to simply integrate.

anonymous · Answer

of function P(t)

fortytherapper · Answer

I'd suggest taking the derivative via Quotient Rule

anonymous · Answer

$$Growth rate = \frac{ dP(t) }{ dt } =\frac{ 400*(2t ^{2}+9)-400t*4t }{ {(2t^{2}+9)}^{2} } =\frac{ -800t^{2}+3600 }{  {(2t^{2}+9)}^{2} } $$

$$P(11)= \frac{ 400*11 }{ 2*11^{2}+9 } thousands$$

$$t=11, \frac{ dP(t) }{ dt }=\frac{ -800*11^{2}+3600 }{ (2*11^{2 }+9)^{2}}  \frac{thousands-resident }{year  }$$

destinyyyy · Answer

Im getting 17.530 for B and -1.479 for C.

destinyyyy · Answer

Is the system incorrect or are my calculations wrong?

freckles · Answer

the population is in thousands

freckles · Answer

therefore you need to multiply both by 1000

freckles · Answer

to get the population and population/year

freckles · Answer

respectively

destinyyyy · Answer

Ohhh I see. Thank you.

freckles · Answer

np