Evaluate the expression for the given value or values.
, for y = -30, z = 5
A. -6
B. 6
C. -5
D. 5
Answer: A
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = xye-y2
A. 
= 0 ; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - y2)
B. 
= ye-y2; 
= 2xye-y2(2y2 - 6); 
= 
= e-y2(1 - 2y2)
C. 
= ye-y2; 
= 2xye-y2(y2 - 1); 
= 
= e-y2(1 - y2)
D. 
= 0; 
= 2xye-y2(2y2 - 3); 
= 
= e-y2(1 - 2y2)
Mathematics
Solve the equation 
. Restrict your attention to the horizontal span of 0 to 5. Round your answer to two decimal places if necessary.
?
A. 4.11 B. 2.74 C. 2.8 D. 4.68
Mathematics
Determine whether the function is a solution of the wave equation.w(x, t) = ln 5cxt
A. Yes B. No
Mathematics
Evaluate the indicated power of i.i-27
A. -1 B. i C. -i D. 1
Mathematics