The Total Annual Revenue of the Miramar Resorts Hotel

Multiple Choice

The total annual revenue of the Miramar Resorts Hotel is related to the amount of money the hotel spends on advertising its services by the function where both and are measured in thousands of dollars. Use this function to:
A. Find the interval where the graph of is concave upward and the interval where the graph of is concave downward.
B. Find the inflection point of .
C. Determine if it would it be more beneficial for the hotel to increase its advertising budget slightly when the budget is $90,000 or when it is $110,000.

A) concave upward on ;
Concave downward on
;
Inflection point is
;

B) concave downward on ;
Concave upward on
;
Inflection point is
;

C) concave upward on ;
Concave downward on
;
Inflection point is
;

D) concave downward on ;
Concave upward on
;
Inflection point is
;

E) concave upward on ;
Concave downward on
;
Inflection point is
;