Use logarithmic differentiation to find the derivative of y.y = 
A. 
B. 
(lnx - ln(x - 8))
C. 
D. - 4
Answer: A
Mathematics
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The payoff (X) for a lottery game has the following probability distribution. Payoff, X$0 $5 Probability0.8 0.2 What is the expected payoff? Is the game fair?
A. $0; Yes B. $0.50; No C. $1.00; No D. $2.50; No
Mathematics
Solve the inequality and graph the solution set.| 7x - 6 | ? 8
A. x ? - 2 or x ? 
; 
? 
B. x ? 2 ; 
C. x ? - 
or x ? 2 ; 
? 
D. - 
? x ? 2 ; 
Mathematics
Find the length of the curve.x = 7 sin t - 7t cos t, y = 7cos t + 7t sin t, 0 ? t ? 
A. 
?2
B. 
?2
C. 
?
D. 
?2
Mathematics
Evaluate the expression.
3
A. 
B. 3
C. 
D. 
Mathematics