Recognize the elementary row operation used and determine the missing entry.
? 
A. - 
B. -12
C. 12
D. 
Answer: A
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Solve the problem. Round to the nearest hundredth, if necessary.The monthly incomes of trainees at a local mill are normally distributed with a mean of $1000 and a standard deviation of $150. What percentage of trainees earn less than $750 a month?
A. 4.75% B. 25.14% C. 22.06% D. 1.67%
Solve the problem.The value of a certain make and model of used car can depend on several factors. The table gives data for the values of three Chevy Caprice station wagons. The value V is measured in dollars, where A is the age of the car in years, and C is the condition of the car rated on a scale of 1 to 10 (10 is excellent condition).
The variables are found to be related by the equation 
Use the information given in the table to write a matrix equation which when solved will yield the values of a, b, and c. Then, using the fact that the inverse of the
matrix 
is 
, find c.
A. c = 400
B. c = 200
C. c = -200
D. c = -400
Evaluate the definite integral by using the method of integration by parts.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Find the slope and y-intercept of the line.4x - 7y = 5
A. slope = 
; y-intercept = - 
B. slope = 
; y-intercept = 
C. slope = 4; y-intercept = 5
D. slope = 
; y-intercept = 