# Thread: force of interest integral

1. ## force of interest integral

How much is 500 at time 1 worth at time 11. Assume that

i cant solve this anyone help me, thanks

2. Originally Posted by actsci231
How much is 500 at time 1 worth at time 11. Assume that

i cant solve this anyone help me, thanks
No one can solve it without a clue as to the force of interest. Your "assume that" doesn't seem to be followed by much.

3. but dont u anti derivavtive the force of interest formula to get a(t), u are also given the time which is 1 and 11 years

4. 1) No, you don't "anti derivative" anything, since that isn't a verb. It requires an integral.

2) I cannot see the gif you attempted to display. Can you write it out?

5. force of interest = 0.0245(1 - 0.007 t) ^(-1)

6. Well, there you go...

$\int_{0}^{11}\left(\frac{0.0245}{1-0.007t}\right)\;dt = A$

$500 \cdot e^{A}\;=\; ??$

Why are you struggling with this? Do you have enough calculus background to handle the integral? Better brush up.

Note: You should also work on using whole words and complete sentences. That WILL improve your presentation.

7. Odd. I can now see the gif. It must be a firewall thing on my other PC.