The equation A = p + prt is used to find the accumulated amount, A, of an investment with principal, p, a certain interest rate, r, and over time, t. What is the value for t, after the equation is rearranged?

Question

bayleejadee · Answer

t=A-p over pr
 t= A+p over pr
 t= A-1 over r
 t = A − p − pr

bayleejadee · Answer

@royalranger @Hero @shirleyarnett

royalranger · Answer

You have any idea where to start?

bayleejadee · Answer

Honestly? Not a clue

royalranger · Answer

Alright so we want to solve for t, therefore we must isolate it.
a = p + prt
Lets begin by subtracting p:
a-p = prt
What do we do next in order to get t by itself?

royalranger · Answer

Example:
|dw:1481920573202:dw|

bayleejadee · Answer

Divide by r? I'm kind of just winging it here

bayleejadee · Answer

Sorry I took so long to answer by the way, I was working on another problem.

royalranger · Answer

Yes you could divide by r, but if you did, you would be left with:
$$\frac{ a-p }{ r } = pt$$
then you could have to divide by p to get t by itself. 
So instead, why don't you try dividing by pr to get t by itself.

bayleejadee · Answer

So, It would be the first option then?

royalranger · Answer

Yep

bayleejadee · Answer

Thank you!

royalranger · Answer

Yep