Question

fuel is purified by passing it through a clay pipe. Each foot of the clay pipe removes a fixed percentage of impurities in the fuel. Let f(x) represent the amount of pollutants, in tons, left in the fuel after it had passed through x feet of the clay pipe.

f(x) = 10(0.8)x

What does the number 0.8 represent?

A: Every foot of the pipe removes 20% of the pollutant.

B: Every foot of the pipe removes 80% of the pollutant.

C: The original amount of pollutant present in the fuel was 80 tons.

D: The original amount of pollutant present in the fuel was 20 tons.