pre cal question if you can help me

Mathematics
Tutor: None Selected Time limit: 1 Day

ln x +ln (x+1) = ln 56

Oct 8th, 2015

Thank you for the opportunity to help you with your question!

ln x + ln (x+1) = ln 56

ln (x*(x+1)) = ln 56

x^2+x=56

x^2+x-56=0

(x+8)(x-7)=0

x=-8 or x=7

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 8th, 2015

please can you help me with this ?

1) An endangered species of fish has a population that is DECREASING  exponentially (A=Aoe^kt). The population 5 years ago was 1900. Today, Only 1100 of the fish are alive.

a) Write an equation that models the decay of the population A(T)

b) Once the population drops below 100, the situation will be irreversible.

when will this happend, according to the model?(round to the nearest whole year)


Oct 8th, 2015

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Oct 8th, 2015
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