Answer:
8 years approximately
The problem (I'm assuming is):
Solve
.
I put a t in the problem where I suspected it in went.
Step-by-step explanation:

Divide both sides by 100:


Rewrite in logarithm form.

Divide both sides by 0.05:

Put left hand side into calculator:


So about 8 years if I wrote down the equation correctly.
When I look at a problem like this, I think of the FOIL method. This method states "You multiply integers in the order of First, Outside, Inside, Last, and then add them together"
(a -3b)(2a - 5b)
First --- 2a * a
Out --- (-5b) * a
In --- (-3b) * 2a
Last --- (-3b) * (-5b)
2a² - 5ab -6ab + 15b²
2a² - ab + 15b²
This would be your answer in simplest form!
I do not know the decimal, but I know the ratio. 7/50. I am not positive about my answer as a decimal but I think it is 7.50.
<span>t=0.007958x
</span>
Hope that helps!