SOLUTION: Please help I know nothing about this subject. Thank you For the following function, C computes the cost in millions of dollars of implementing a city recycling project when x pe

Question 113634: Please help I know nothing about this subject. Thank you
For the following function, C computes the cost in millions of dollars of implementing a city recycling project when x percent of the citizens participate. C(x)= 1.4x
----
100-x
A) using this model, approximately what is the cost if 60% of the citizens participate. answer and show work

B) using this model estimate the percentage of participation that can be excepted if $4 million is spent on this recycling project. Set up an equation and solve algebraically. Round to the nearest whole percent.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
For the following function, C computes the cost in millions of dollars of implementing a city recycling project when x percent of the citizens participate.
C(x)=
:
A) using this model, approximately what is the cost if 60% of the citizens participate. answer and show work
:
Substitute 60 for x in the above equation, find C(x)
C(x)=
:
C(x)=
:
C(x) = 2.1 million dollars when 60% participate
:
:
B) using this model estimate the percentage of participation that can be excepted if $4 million is spent on this recycling project. Set up an equation and solve algebraically. Round to the nearest whole percent.
:
= 4: substituted 4 for C(x)
:
Multiply equation by (100-x) to get rid of the denominator:
1.4x = 4(100 - x)
:
1.4x = 400 - 4x
:
1.4x + 4x = 400
:
5.4x = 400
:
x = 400/5.4
:
x = 74% participation when 4 million is spent
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