Find u ? v, where ? is the angle between the vectors u and v. Round the answer to the nearest tenth.
= 8, 
= 6, ? = 73°
A. 4.1
B. 47.9
C. 164.2
D. 14
Answer: D
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Calculate the mean of the set of data values. If necessary, round to one more decimal place than the data values have. The retirement ages, in years, of nine employees of a software company: 
A. 57.3 yr B. 58.0 yr C. 56.6 yr D. 57.9 yr
Solve the equation by completing the square.x2 - 12x + 11 = 0
A. {
, -1}
B. {11, 1}
C. {10, 1}
D. {-11, -1}
Evaluate the integral using the given substitution.
dx , u = 2x - 4
A. - 
(2x - 4)-5 + C
B. (2x - 4)-5 + C
C. - 
(2x - 4)-7 + C
D. - 
(2x - 4)-5 + C
Set up an equation that can be used to solve the problem. Solve the equation and answer the question asked. A couch sells for $920. Instead of paying the total amount at the time of purchase, the same couch can be bought by paying $300 down and $60 a month for 12 months. How much is saved by paying the total amount at the time of purchase?
A. $10 B. $100 C. $200 D. $760