## anonymous one year ago Help w/ expo equations

1. Theloshua

no, incorrect

2. anonymous

okay, but just so you know, that's the equation I have to use, so that part can't be wrong. I guess my answer is the wrong part.

3. Theloshua

because you divided on both sides, which you cant do, because the x isnt a multiplication value, its a squared value

4. Theloshua

the equation is right, you just used it incorrectly

5. anonymous

okay. On my paper there is no ^ to indicate anything it's just written as I wrote it.

6. anonymous

so maybe that's where I got confused.

7. Theloshua

|dw:1440374565771:dw|

8. Theloshua

is that what the equation looks like?

9. Theloshua

okay, i believe your first step was to divide the 20000 on both sides, correct?

10. anonymous

yeah I think so

11. anonymous

I'm thinking my answer is 4 years now.

12. Theloshua

okay, thats correct i believe

13. Theloshua

can you please tell me what you did to solve just to make sure?

14. anonymous

Okay on the next page, it says that it the answer to it was 4 years. So I did it right the 2nd time.

15. anonymous

Thanks for helping me a bit. :) Much appreciated. I almost put down the wrong answer.

16. Theloshua

okay, no probs :D

17. anonymous

Refer to the attachment from Mathematica 9.

18. anonymous

this question is close, when I clicked close, it didn't do it apparently so yeah.

19. anonymous

$10,000 = 20,000 (0.85)^x$ $\frac{1}{2}=.85^x$ is a start

20. anonymous

weird internet connection or something

21. anonymous

solve via $x=\frac{\ln(.5)}{\ln(.85)}$ and a calculator