What rate of interstis required so that $1000 will yield $1900 after 5 years if the interset rate is compounded monthly. And I got 12.9% Now How long will it take a sum of money to triple if it is invested at 10% compounded daily

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What rate of interstis required so that $1000 will yield $1900 after 5 years if the interset rate is compounded monthly. And I got 12.9% Now How long will it take a sum of money to triple if it is invested at 10% compounded daily

Mathematics
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there is a formula for this. do you know it / did you use it for the first question?
yes it is A=P(1+r/n)^nt
ok so: r = .10 n = 365 A = 3*P \[3*P = P*(1+\frac{.1}{365})^{.1*t}\]solve for t.

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Other answers:

so what do we do know
do i divide by 3
well you can start by dividing by P to get rid of it. then you will need to solve for t, which will involve using logarithms.
so 3=p(1+10/365)^365/t
is it right
no. after dividing by P:\[3= (1+\frac{.1}{365})^{.1*t}\]
then you must use logarithms. I use ln which is log_e, the natural log. \[\ln(3)= .1*t*\ln(1+\frac{.1}{365})\] then solve for t.
ok can you help me do that it really hard for me
please
so remember, what you do to one side of the equation, you must do to the others. since we want t by itself, we can divide by the other terms to isolate it, like so: \[\frac{\ln(3)}{\ln(1+\frac{.1}{365})} = .1*t\] then divide by .1 and you will have t by itself.
ok can u help more
what do you not understand?
the log
its so complicated
can you use a calculator?
maybe if you go step by step with me then i will get it
yes i can use a calc.
i can but i still need help
take the log(3), then divide by the other log. then divide by .1
ok log 3 is .47712125
now i divide by what
log(1+.1/365)
i got 1.18968
is it right
is it right
i got .4010500723
how did you get 1.18968? you must do the inside of the parentheses first. here is it in an online calculator: http://www.wolframalpha.com/input/?i=log%281%2B.1+%2F+365%29&a=*FunClash.log-_*Log10.Log-
ok But isnt it .10 instead of .1
because it wat to know How long will it take a sum of money to triple if it is invested at 10% compounded daily
those are the same number! .1 = .10 = .100 = .10000000
so what is the answere
can you not calculate it? it would be better then me just giving it to you.
i tried
ut i got a weird answer and im not sure i got it right
http://www.wolframalpha.com/input/?i=log%283%29+%2F+log%281%2B.1+%2F+365%29+%2F+.1&a=*FunClash.log-_*Log10.Log-
it 40104.8
is that it
that doesn't seem right though, heh. does it?
no it doesnt
because i messed up! it is n*t, not r*t. so you should not divide by .1, but by 365
ok
so now can u help again
you should try and do these yourself on a calculator. you can type it in on this site if you want even. http://www.wolframalpha.com/input/?i=log%283%29+%2F+log%281%2B.1+%2F+365%29+%2F+365&a=*FunClash.log-_*Log10.Log-
yes
You do it also and then we will compare aur answers
okay
i just did it. click on that link. it is an online calculator.
ok i got 10991.6
is that what you got
no. click on the link to see. http://www.wolframalpha.com/input/?i=log%283%29+%2F+log%281%2B.1+%2F+365%29+%2F+365&a=*FunClash.log-_*Log10.Log-
ok thanks
im going to give you a medal and be your fan if you be my fan
do u agree
u there

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