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Mathematics 21 Online
OpenStudy (anonymous):

i really need help! i need answers and how you got it. please ( attachment below)

OpenStudy (anonymous):

OpenStudy (anonymous):

OK, you have the formula

OpenStudy (anonymous):

\[P = A* e^{k*t}\]

OpenStudy (anonymous):

so, in 6 years, from 1991 to 1997, the population grew from 114m to 120m

OpenStudy (anonymous):

\[120m = 114m * e^{k*6}\]

OpenStudy (anonymous):

you need to solve for k

OpenStudy (anonymous):

to solve for k in \[P=A∗e^{kt}\] you will need do \[e^{k∗t}=P/a\] then, \[ln(e^{k∗t})=ln(P/A)\] this becomes \[k∗t=ln(P/A)\] , then solve or k --> \[k=ln(P/A)/t\] so plug in the values, P = 120, A = 114, t = 6 to solve for k

OpenStudy (anonymous):

then you need determine the population in 2014

OpenStudy (anonymous):

\[P=A*e^{k*13}\] t=13 here because 2014-1991 = 13 yeas

OpenStudy (anonymous):

it is division, there is only multiplication going on here

OpenStudy (anonymous):

this is a lot of work there is a shorter way which may be easier

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