Simplify. Combine like terms if possible.-m2 + 8m2
A. -8m4
B. 9m2
C. 7m2
D. -7m2
Answer: C
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Find all the second order partial derivatives of the given function.f(x, y) = xy2 + yex2 + 5
A. 
= 2yex2(1 + 2x2); 
= 2x; 
= 
= 2y + 2xex2
B. 
= 2yex2; 
= 2x; 
= 
= 2y + 2xex2
C. 
= yex2(1 + 2x2); 
= x; 
= 
= y + xex2
D. 
= 2yex2; 
= 2x; 
= 
= 2xex2
The weight of a certain type of fish is a power function of its length. The value of the power in this function is 
. If the weight is multiplied by 2.94, how is the length affected? Round your answer to two decimal places if necessary.
?
A. Length is multiplied by 8.64. B. Length is multiplied by 1.86. C. Length is multiplied by 1.71. D. Length is multiplied by 9.13.
Write the number as the product of a real number and i.- 
A. -11i
B. 11
C. i
D. 11i
Complete the identity.
= ?
A. sec x - tan x + 1 B. sec x - tan x C. sec x + tan x D. -sec x - tan x