The cost, in millions of dollars, to remove x% of pollution from a smokestack is expressed as:

C=2300/(135-1.35x)

What is the cost to remove 70% of the pollutant? Be sure to express your answer with the proper units! Note: the “x” represents the whole number percent (as in 75 for 75%), not the decimal (if a percent is 65% for example, you would enter 65 NOT 0.65).