Solve the problem.A new health food store runs an advertising campaign. Daily sales (in dollars) after x days of advertising are given by ?S(x) = 
By sketching the graph of this function, answer the following questions. What is the horizontal asymptote of the graph? What does this suggest about future sales? Explain your reasoning. If the advertising campaign costs $3200 per day, at what point should it be discontinued? Why?
What will be an ideal response?
Answers will vary. Possible answer: The horizontal asymptote is 
This suggests that eventually daily sales will level off at around $2500. Thus the minimum daily sales to be expected are $2500. The advertising campaign should be discontinued after 7 days because after 7 days the cost of the campaign is higher than the daily sales.
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Find the indicated term by use of the following information. The r + 1 term of the expansion of (a + b)n is given by 
an - r brThe term involving b6 in (a + b)12
A. 110,880a6b6 B. 665,280a6b6 C. 924a6b6 D. 6a6b6
Find the reciprocal of the number.18
A. 1
B. 
C. 
D. 18
Solve the equation.log (4 + x) - log (x - 5) = log 4
A. 8
B. ?
C. - 8
D. 
A trough has vertical ends that are equilateral triangles with sides of length 7 ft. If the trough is filled with water to a depth of 4 ft, find the force exerted by the water on one end of the trough. Round to one decimal place. (The weight density of water is 62.4 lb/ft3.) Select the correct answer.
a. 384.3 lb b. 1,337.7 lb c. 768.6 lb d. 2,675.4 lb