Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = 3xx2
A. 3xx2 + 1(2 ln 3x )
B. xx2 + 1 ln 3x
C. 3xx2 + 1(2 ln 3x + 1)
D. x(2 ln 3x +1)
Answer: C
Mathematics
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A. 
B. 
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D. 
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Use I = Prt for simple interest to find the indicated quantity.P = $3000; t = 90 days; I = $105. Find r. (Use 360 days in a year.)
A. 3.5% B. 14.0% C. 9.7% D. 14.2%
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Graph the region described by the inequality.2x ? -5y
A. 
B. 
C. 
D. 
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Refer to the figure in which O is the center of the circle, 
is a tangent, m?PCE = 20° m?Boc = 80°, PE = 10 ft, PD = 12 ft, ER= 4 ft, and BR= 5 ft.
Mathematics