Craig bought a treadmill for $400. He estimates that the annual costs to maintain the machine will be $36. Which rational functi
2 answers:
Given that Craig bought a treadmill for 400 dollars.
Useful life of the macine = x
Hence annual purchase cost spread over x years will be 400/x per year.
In addition, there is an annual maintenance cost of 36 dollars.
Hence Average annual cost in dollars = purchase cost per year+maintenance cost per year
=
Hence answer for rational function is
either
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Answer:
The value of q that maximize the profit is q=200 units
Step-by-step explanation:
we know that
The profit is equal to the revenue minus the cost
we have
---> the revenue
---> the cost
The profit P(q) is equal to
substitute the given values
This is a vertical parabola open downward (because the leading coefficient is negative)
The vertex represent a maximum
The x-coordinate of the vertex represent the value of q that maximize the profit
The y-coordinate of the vertex represent the maximum profit
using a graphing tool
Graph the quadratic equation
The vertex is the point (200,-120)
see the attached figure
therefore
The value of q that maximize the profit is q=200 units
