Evaluate. Assume u > 0 when ln u appears. 
A. 15 ln (e7x + 1) + C
B. 
(e7x + 1)-2 + C
C. 
ln (e7x + 1) + C
D. 
ln (e7x + 1) + C
Answer: C
Mathematics
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Find a Cartesian equation for the line whose polar equation is given.r cos
= 4
A. y = 8 - 
x
B. y = 
x + 4
C. y = 8 - 
x
D. y = 4 - 
x
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A. 20,358,520 B. 312 C. 18,009,460 D. 720
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