Answer:
3
Step-by-step explanation:
f(x) has the variable in the exponent, so is an exponential function.
The base is 3.
__
The base is what is being raised to the power of x.

Start by dividing with a calculator.

Subtract
, since it represents the cost of a mat.

Move the decimal two places to the right to convert to a percentage.

I would say a but not 100% sure.
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