Compute r, the linear coefficient of correlation, for the given data.Two different tests are designed to measure employee productivity and dexterity. Several employees are randomly selected and tested with these results.
A. 0.115
B. 0.471
C. 0.986
D. -0.280
Answer: C
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Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
cscn-2 x cot x - 
B. 
= 
cscn-2 x cot x + 
C. 
= cscn-2 x cot x + (n - 2) 
D. 
= 
cscn-2 x cot x - 
Find the range of the given function.f(x) = 3x2 - 6x + 1
A. (-?, 2] B. (-?, -1] C. [-2, ?) D. [1, ?)
Solve the problem.The current I, in amperes, flowing through a particular ac (alternating current) circuit at time t seconds is I = 110 sin (50?t)What is the period and amplitude of the current?
A. period = 
second, amplitude = 50
B. period = 50? seconds, amplitude = 
C. period = 
second, amplitude = 300
D. period = 
second, amplitude = 110
Solve by graphing.The value y (in hundreds of dollars) of Juan's computer is approximated by the linear equation 
where x is the number of years since he first bought the computer. Graph the equation and use the graph to estimate the value of the computer 2 years after it was purchased. 
A. $900 B. $760 C. $600 D. $700