Problema Solution
1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C = 6000/200-2(x)
a. What is the cost to remove 75% of the pollutant?
b. What is the cost to remove 90% of the pollutant?
c. What is the cost to remove 99% of the pollutant?
d. For what value is this equation undefined?
Answer provided by our tutors
We have C = 6000/(200-2x).
(a)
put x = 75
C = 6000/(200-2*75) = 120 million dollars
(b)
Put x = 90:
C = 6000/(200-2*90) = 300 million dollars
(c)
C = 6000/(200-2*99) = 3000 million dollars
(d)
It is undefined for x = 100, the denominator cannot be 0.