Brian opened a bank account that compounded interest. Brians account can be modeled this way.

Y=ne(kt)
n-initial amount deposited
t=time in years
k=growth constant

500 initial amount no deposit or withdrawal
$626 in the end

Question

Brian opened a bank account that compounded interest. Brians account can be modeled this way.

Y=ne(kt)
n-initial amount deposited 
t=time in years
k=growth constant

500 initial amount no deposit or withdrawal  
$626 in the end

zepdrix · Answer

Is the (kt) an exponent on the e term? :)

bacon · Answer

yes

bacon · Answer

i just don't know  how to put it up there

zepdrix · Answer

$626 in the end. So is the problem asking, how much time has passed?

anonymous · Answer

oh.. :)

anonymous · Answer

was about to say, "looks like you got this already!"

zepdrix · Answer

lol dat jake :P

anonymous · Answer

you need to take logs (natural logs?) to solve for n

bacon · Answer

???

anonymous · Answer

heh... many math problems is making my mind mush (bonus points for alliteration)

bacon · Answer

its asking what the percent of interest it is i thnk

anonymous · Answer

oops, if it's solve for time passed, it's solve for t.

Need to get the kt out of the exponent, then solve for t

(I am weak on logs, I hate to admit... maybe @zepdrix will help)

zepdrix · Answer

There doesn't seem to be enough information here :(
Bacon the problem says "in the end" 626.
Do they tell you how much time has passed when he has 626?

bacon · Answer

nope

bacon · Answer

thats what i don't really understand

zepdrix · Answer

Hmmm thinking :)

anonymous · Answer

I apologize, but I have to run... would love to keep working this but I just ran out of time before a "must do" appt...

bacon · Answer

ok thanks for trying though

bacon · Answer

you have helped me alot

zepdrix · Answer

|dw:1348788448726:dw|
hmm i think we need more info in order to solve this D:

Unless im missing something :\