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Mathematics 15 Online
OpenStudy (imterribleatmath):

@TGstudios

OpenStudy (tgstudios):

sry bout the last one...

OpenStudy (imterribleatmath):

OpenStudy (imterribleatmath):

its all good

OpenStudy (tgstudios):

ok I understand this better now... look here: Exponential word problems almost always work off the growth / decay formula, A = Pert, where "A" is the ending amount of whatever you're dealing with (money, bacteria growing in a petri dish, radioactive decay of an element highlighting your X-ray), "P" is the beginning amount of that same "whatever", "r" is the growth or decay rate, and "t" is time. The above formula is related to the compound-interest formula, and represents the case of the interest being compounded "continuously".

OpenStudy (imterribleatmath):

ok

OpenStudy (tgstudios):

so replace P with 98 million

OpenStudy (imterribleatmath):

ok

OpenStudy (tgstudios):

r with 5 million and t with 7 years

OpenStudy (tgstudios):

I GOT IT: HERE: final=initial(rate^time) first you want to find the rate.... final/initial=rate^time ln(f/i)=tlnr lnr=ln(f/i)/t r=e^[lnitial(f/i)/t] Once you find the rate you are left with the basic equation for exponential growth for this problem... r in this case is r=e^[lnitial(103/98)/7]~1.007 p=98(1.007)^24~116.23 million sorry for the wait ;)

OpenStudy (tgstudios):

*sudden realization*

OpenStudy (tgstudios):

XD I know my brain wasn't working for a second

OpenStudy (imterribleatmath):

they dont want it as a decimal, i think it needs to be a interger

OpenStudy (tgstudios):

your answer will be 116 million ;)

OpenStudy (imterribleatmath):

correct

OpenStudy (tgstudios):

:D

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