For the following function, C computes a value, where if you add millions of dollars to the value, the result is the cost of implementing a city recycling project when x, as a percent(not its decimal equivalent), citizens participate.
C(x)= 1.5x/100-x
1). Using this model, determine the cost if 60% of the citizens participate?
2). Using this model, find the percentage of participation that can be expected if $5million is spent on this recycling project? Set up an equation and solve algebraically. Round to the nearest whole percent.