Find the requested approximation for the definite integral using the indicated value of n. Give all answers to three decimal places, when necessary. Find Ln, Rn, and their average
; n = 3
A. L3 = 46
R3 = 73
average = 59.5
B. L3 = 38
R3 = 65
average = 51.5
C. L3 = 65
R3 = 38
average = 51.5
D. L3 = 12.667
R3 = 21.667
average = 17.167
Answer: B
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A. (9y2 + 5)2 B. (9y2 + 5)(9y2 - 5) C. Prime D. (9y2 - 5)2
Find an equation for the ellipse described.Vertices at (5, -4) and (5, 8); length of minor axis is 6
A. 
+ 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Solve the problem.Find an equation of the line containing the centers of the two circles x2 + y2 - 2x + 10y + 25 = 0
and x2 + y2 + 6x - 4y + 9 = 0
A. 7x - 4y - 13 = 0 B. -7x - 4y - 13 = 0 C. -3x + 2y - 13 = 0 D. -7x + 4y - 13 = 0
Solve the problem.Barnes and Able sell life, health, and auto insurance. Their sales, in dollars, for May and June are given in the following matrices. Life Health AutoMay: 
June: 
Find a matrix that gives total sales, in dollars, of each type of insurance by each salesman for the two-month period.
A. 
B. 
C. 
D. 