C(x)=1.4xover 100-x?

Question

the following function computes the cost c(in millions of dollars) of implementing a city recycling project when x percent of the citizens.... using this model determine the percentage that can be execpted if 4million is spent

Answer 1

Cost=4 million so C=4

If function is:

C=1.4X / (100-X)

Then x is:

X=74.0741

If function is:

C=(1.4X/100) - X

Then x is:

X= - 4.0568