Find the derivative of the function.y = ln 7x
A. 
B. - 
C. 
D. - 
Answer: C
Mathematics
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Determine whether the given function satisfies a Laplace equation.f(x, y, z) = cos (-5x) sin (-2y) e(
z)
A. No B. Yes
Mathematics
Rewrite as a complex fraction and simplify.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Use the formula L = 10 ? log 
, where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the soundwave, and 
A certain noise produces 6.35 × 10-4 W/m2 of power. What is the decibel level of this noise?
A. 203 dB B. 78 dB C. 88 dB D. 9 dB
Mathematics
Solve the system by graphing. If there isn't a unique solution to the system, state the reason.x + 5y = 59x - 2y = -2
A. (0, 0) B. (1, 1) C. (1, 0) D. (0, 1)
Mathematics