The following table shows the median age of automobiles and trucks on the road for a certain country. Use linear regression to find the linear equation that is the best fit for the data, with x equal to the number of years past 1980.
?
Year
Median Age
1980
4.0
1985
5.9
1990
6.6
1995
8.0
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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Using Green's Theorem, compute the counterclockwise circulation of F around the closed curve C.F = (8x + 7y)i + (5x - 7y)j; C is the region bounded above by y = -2x2 + 100 and below by 
in the first quadrant
A. - 
B. - 1940
C. - 
D. 990
Mathematics
Use the fundamental identities to simplify the expression.
+ sec ? cos ?
A. 1 B. sec2? C. tan2? D. csc2?
Mathematics
Give the exact value of the expression.cos 
A. 
B. 
C. 
D. 
Mathematics
Simplify.(7 + 3) ? 7 + [49 ÷ (7 ÷ 7)]
A. 29 B. 119 C. 77 D. 71
Mathematics