Answer:
2.6
Step-by-step explanation:
Using the inverse function, it is found that the equation is:

It's initial value is 20.
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We want to find the inverse of:

To do this, we <u>exchange y and t, and isolate y.</u>
Then:








It's initial value is:

Rounding, 20.
A similar problem is given at brainly.com/question/23950969
200 is the answer i know this because 40%of 200 is 80