Does anybody know how to do this? If the population of India was 650 million a decade ago and is now 790 million people and continues to grow exponentially at the same rate,what will the population be in 5 years?

Question

Does anybody know how to do this?                        If the population of India was 650 million a decade ago and is now 790 million people and continues to grow exponentially at the same rate,what will the population be in 5 years?

amistre64 · Answer

790 = 650(1+r)^10

anonymous · Answer

can you please help me step by step.please because im having a hard time with this problem

amistre64 · Answer

A=P(1+r)^t

A/P = (1+r)^t

(A/P)^(1/t) = 1+r

(A/P)^(1/t) - 1 = r

Ao = 650(1+((790/650)^(1/10)) - 1)^15

maybe

anonymous · Answer

thankyou for helping me ;)

amistre64 · Answer

do you have options to check against?

amistre64 · Answer

http://www.wolframalpha.com/input/?i=650%281%2B%28%28790%2F650%29%5E%281%2F10%29%29+-+1%29%5E%2815%29

anonymous · Answer

no i dont

amistre64 · Answer

hmm, then im not sure what setup to use; i spose we could try a continual setup and see if its close to what this one is

amistre64 · Answer

A=Pe^(rt)

A/P=e^(rt)

ln(A/P) = rt

ln(A/P)/t = r

A = 650e^(15*ln(790/650)/10)

hmm, that works out remarkably well too

amistre64 · Answer

both give me 870.93; so id say 871 just so we dont have any .93 people walking about

amistre64 · Answer

or tp be more exacter; 870,930,000  might suffice

anonymous · Answer

thank you for your help.

amistre64 · Answer

yep, hope it was readable