<PRE><B>Question 377980</B>
Your science class is taking a field trip to an observatory. The cost of a presentation and a tour of the telescope is $60 for the group plus an additional $3 per person. 
a) Write an equation that gives the total cost C as a function of the number of people p in the group.
C(x) = 60 + 3x
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b) Find the cost if 25 people are in the group.
C(25) = 60 + 3*25
C(25) = 60 + 75
C(25) = $135
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cheers,
Stan H.
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