?Find the points of inflection and discuss the concavity of the function.
??
?
?
A. ?inflection point at 
; concave downward on 
; concave upward on 
B. ?inflection point at 
; concave upward on 
; concave downward on 
C. ??inflection point at 
; concave downward on 
; concave upward on 
D. ?inflection point at 
; concave upward on 
; concave downward on 
E. ?none of the above
Answer: A
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What will be an ideal response?
Solve the problem.An experienced accountant can prepare a certain complexity of tax return in 20 hr. A novice accountant can do the job in 24 hr. How long will it take them to do the job working together?
A. 120 hr
B. 10
hr
C. 
hr
D. 
hr
Write the partial fraction decomposition of the rational expression.
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Write a system of linear inequalities that has the given graph.
A. y ? 0, x ? 0, x ? 6, and y + x ? 2 B. y ? 0, x ? 0, x ? 6, y ? 7, and y + x ? 2 C. y ? 0, x ? 0, y ? 7, and y + x ? 2 D. x ? 6, y ? 7, and y + x ? 2