Find the sum of the first n terms of the following arithmetic sequence.a1 = 5, d = 5; n = 4
A. 25
B. 15
C. 20
D. 50
Answer: D
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Solve the problem.If f(x, y) = (2000ey)/(1 + 
/2) represents the population density of a planar region on Earth, where x and y are measured in miles, find the number of people within the rectangle -9 ? x ? 9 and -4 ? y ? 0.
A. 4000(1 - e-4) ln 5 ? 9416
B. 4000(1 - e-4) ln 
? 6694
C. 2000(1 - e-4) ln 
? 3347
D. 8000(1 - e-4) ln 
? 13,388
Solve the inequality. Give the solution set in both interval and graph forms.5x - 3 ? 4x - 5
A. (-?, 5)
B. (5, ?)
C. [-2, ?)
D. (-?, -2]
Solve the problem.Barnes and Able sell life, health, and auto insurance. Sales for May and June are given in the matrices. Life Health AutoM = 
J = 
Find the matrix that would give total sales.
A. 
B. 
C. 
D. 
Solve the problem.The following table shows the average number of practice hours per week, for a sample of professional golfers, along with their average tournament scores per round. 
Determine the correlation coefficient for the hours practiced per week and the average score per round.
A. -0.8841 B. -0.8633 C. -0.8745 D. -0.8984