The cost, C, in United States Dollars ($), of cleaning up x percent of an oil spill along the Gulf Coast of the United States increases tremendously as x approaches 100. One equation for determining the cost (in millions $) is:

Complete Question

On the uploaded image is a similar question that will explain the given question

The value of k is  

The percentage  of the oil that will be cleaned is

Step-by-step explanation:

From the question we are told that

   The  cost of cleaning up the spillage is    

     The  cost of cleaning x =  70% of the oil is  

Now at   we have  

Now  When  

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.