Question

A 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? Every foot of the pipe keeps 80% of the pollutant. Every foot of the pipe removes 80% of the pollutant. The original amount of pollutant present in the fuel was 80 tons. The original amount of pollutant present in the fuel was 20 tons.

Answer 1

Every foot of the pipe keeps 80% of the pollutant.

Explanation:

In this case we have to analyze the equation based in the description given, as we can see the statements that could be true are a and b, if we use the equation we can see that if the number of feet increase the amount of pollutants in the fuel increase, so the answer is every foot of the pipe keeps 80% of the pollutant.

Answer 2

The equation calculates the amount of pollutants left in the fuel, so the 0.8 in the equation would represent that every foot of the pipe keeps 80% of the pollutant.