Solve the problem.The financial department of a company that manufactures portable MP3 players arrived at the following daily cost equation for manufacturing x MP3 players per day: 
The average cost per unit at a production level of players per day is 
(A) Find the rational function 
.(B) Graph the average cost function on a graphing utility for 10 ? x ? 200. (C) Use the appropriate command on a graphing utility to find the daily production level (to
the nearest integer) at which the average cost per player is a minimum. What is the minimum average cost (to the nearest cent)?
What will be an ideal response?
(A) 
(x) = 
+ 105 + x
(B) 
(C) 39; $182.46
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Eliminate the parameter t in the following:
?
?
A. 
, 
, 
B. 
, ,
C. 
, ,
D. 
, ,
E. 
, ,
Use the quotient rule to simplify the expression.
A. 
B. 
C. 0
D. 
Solve the problem.The half-life of a certain radioactive substance is 22 years. Suppose that at time 
there are 21 g of the substance. Then after t years, the number of grams of the substance remaining will be: N(t) = 21
t/44How many grams of the substance will remain after 242 years? Round to the nearest hundredth when necessary.
A. 0.23 g B. 0.46 g C. 0.12 g D. 0.06 g
Round the number to the place indicated.Round to the nearest tenth: 10.871
A. 10.9 B. 10.87 C. 11.0 D. 10.8