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a.
Find an exponential function to model the percent of impurity left after the kerosene travels x feet.
of the impurities are removed for every foot.
Since of the impurities are removed for every foot remaining impurities .
The percent of impurity left after the kerosene travels x feet is .
b.
The function .
Graph of the function .
c.
Find percent of the impurity remains after the kerosene travels feet.
Substitute in .
.
Percent of the impurity remains after the kerosene travels feet is .
d.
No, because the graph has a horizontal asymptote , so the percentage of impurities never reach to .
a.
The percent of impurity left after the kerosene travels x feet is .
b.
Graph of the function is :
c.
Percent of the impurity remains after the kerosene travels feet is .
d.
The percentage of impurities never reach to .
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