Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (x + 8)x
A. x ln(x + 8)
B. (x + 8)x
C. ln(x + 8) + 
D. x + (8)x-1
Answer: B
Mathematics
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Find the arc length parameter along the curve from the point where t = 0 by evaluating 
r(t) = (2cos t)i + (2sin t)j + 7tk
A. 
t
B. 
t
C. 
t
D. 
t
Mathematics
Use the commutative law of multiplication to write an equivalent expression.uv
A. u + v B. vu C. (u)(v) D. u(v + 1)
Mathematics
Simplify. Assume variables represent nonnegative values.
A. 6
B. 7
C. 61
D. 5
Mathematics
Find the derivative of y with respect to x, t, or ?, as appropriate.y = x7ln x - 
x3
A. 8x6 - x2 B. x6 - x2 + 7x6ln x C. x7ln x - x2 + 7x6 D. 7x6 - x2
Mathematics