Solve the problem.
-The average cost of producing $x$ specialty phones is given by the function $f ( x ) = 15 + \frac { 3600 } { x }$. Find the number of phones that must be produced for the average cost to be $\$ 24$.
A) 360 phones
B) 40 phones
C) 440 phones
D) 400 phones

Question

Quizplus · Accepted Answer

To find the number of phones, set $f(x) = 24$: $15 + \frac{3600}{x} = 24$. Solving for $x$, we get $ \frac{3600}{x} = 9 $, so $x = \frac{3600}{9} = 400$.

Solve the Problem xxx Specialty Phones Is Given by the Function f(x)=15+3600xf ( x ) = 15 + \frac { 3600 } { x }f(x)=15+x3600​

Solve the Problem $x$ Specialty Phones Is Given by the Function $f ( x ) = 15 + \frac { 3600 } { x }$