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?

e. Do the answers to sections a. through d. match your expectations? Explain why or why not.

Model is not given. Insufficient data.

To find the cost to remove a certain percentage of pollution, we need a specific equation that represents the relationship between the cost and the percentage of pollution removed. Without the equation, we cannot provide numerical answers to the questions. However, I can explain the general process you can follow to find the answers.

1. The first step is to determine the specific equation that models the relationship between the cost and the percentage of pollution removed. This equation might be provided in the given information or in an accompanying context. For example, it could be a linear equation, a quadratic equation, or another type of equation.

2. Once you have the equation, you can substitute the given percentage values into the equation to find the corresponding costs.

a. Substituting 75% into the equation will give you the cost to remove 75% of the pollutant.
b. By substituting 90% into the equation, you can find the cost to remove 90% of the pollutant.
c. Substituting 99% into the equation will give you the cost to remove 99% of the pollutant.

d. To answer the question about when the equation is undefined, we need to examine the equation itself. It could be that certain values of x make the equation undefined or result in a division by zero. In that case, we need to identify those values.

e. To determine whether the answers match your expectations, you would need to have some prior knowledge or assumptions about the relationship between the cost and the percentage of pollution removed. It's hard to provide a definitive answer without the specific equation or any additional context.