Saturday

December 20, 2014

December 20, 2014

Posted by **kennisha** on Sunday, April 22, 2012 at 7:33pm.

A) according to the model, what will the population be in 2020?

B)in what year is the population predicted to be 300,000?

- math -
**Reiny**, Sunday, April 22, 2012 at 9:01pmso for 2020 , t = 13

P(13) = 12(13)^2 + 800(13) + 40000

= .....

for the population to be 300 000

300000=12t^2 + 800t + 40000

12t^2 + 800t - -260000=0

3t^2 + 200t - 65000=0

let's use the formula

t = (-200 ± √820000)/6

= 117.6 years or a negative

totally unrealistic answer, but mathematically correct

the year would be 2007+117.6 = appr 2125

**Answer this Question**

**Related Questions**

math - The population of a Canadian city is modelled by P(t)=12t^2+800t+40000, ...

Algebra - Solve. The population of a particular city is increasing at a rate ...

Population growth - The population P of a particular city, Metropia, is growing ...

algebra 1 - the population of a city can be modeled using the equation p=40,000x...

Epidemiology - Age (Years) Influenza / Pneumonia Deaths (Di) 2007-2011 ...

Math/Trig - If the population of rabbits in a certain area is modeled by the ...

math - The Question is: The value of a new car depreciates at a rate of 12% per ...

math - In 2000 the population of a state was 5 million and growing continuously ...

Pre-Calcs - Amount after time t A (t) = yobt Where: yo = starting amount b = ...

math - Suppose that the population of a town is described by P=0.16t^2+7.2t+100...