I am sorry i dont understand
Answer:

We divide both sides by 100000 and we got:

Now we can apply natural logs on both sides;

And then the value of t would be:

And rounded to the nearest tenth would be 9.2 years.
Step-by-step explanation:
For this case since we know that the interest is compounded continuously, then we can use the following formula:

Where A is the future value, P the present value , r the rate of interest in fraction and t the number of years.
For this case we know that P = 100000 and r =0.12 we want to triplicate this amount and that means
and we want to find the value for t.

We divide both sides by 100000 and we got:

Now we can apply natural logs on both sides;

And then the value of t would be:

And rounded to the nearest tenth would be 9.2 years.
Answer:
A 4^-2
Step-by-step explanation:
(4^3 * 4^-2) -2
(4^3-2)-2
(4^1)-2
4^-2
If 20 pencil=12 ounces then 50pencil=30 ounces in order to get from 20 to 50 you multiply 2.5 to 20 so just multiply 2.5 to 12 and you get 30