Question

1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by
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 1

modeled by c= 6000/200-2x

Answer 2

start replacing the variable \(x\) by the numbers 75, 90, 99

Answer 3

for example, the first one is
\[C=\frac{6000}{200-2\times 75}=\frac{6000}{200-150}=\frac{6000}{50}=120\]

Answer 4

as for part d
it is undefined when \(x=100\) because \(200-2\times 100=0\) and you cannot divide by zero