an investor deposits £5000 in a savings account which gives a compound interest rate of 5.6%.
i)calculate the value of the investment at the end of 2, 4, 6, 8 and 10 years and produce a graph of the value of the investment(A) (vertiacal axis) against time (years) (horizontal axis)

(ii)using the graph, and proving by calculation, find how long it will take for the origional £5000 investment to double in value,

I've tried and tried but can't work this out. I know i'm useless. need this for tmrw

2. Originally Posted by jimbox
an investor deposits £5000 in a savings account which gives a compound interest rate of 5.6%.
i)calculate the value of the investment at the end of 2, 4, 6, 8 and 10 years and produce a graph of the value of the investment(A) (vertiacal axis) against time (years) (horizontal axis)

(ii)using the graph, and proving by calculation, find how long it will take for the origional £5000 investment to double in value,

I've tried and tried but can't work this out. I know i'm useless. need this for tmrw
You can't be struggling with this.

$5000*(1.056)^{2}$

$5000*(1.056)^{4}$

$5000*(1.056)^{6}$

$5000*(1.056)^{8}$

$5000*(1.056)^{10}$

$5000*(1.056)^{x}\;=\;10000$ Solve for x.

Do we have to use "e"?

Really, if you cannot do these problems, you need to have a serious chat with your academic advisor. It only gets harder from here.