Find the product. Write the answer in standard form.(
+ 6i)(
- 6i)
A. 3 - 36i
B. -3
C. 39
D. 3 + 36i
Answer: C
Mathematics
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Solve the problem.Given the supply and demand functions below, find the demand when p = $12. S(p) = 5pD(p) = 120 - 4p
A. 48 B. 72 C. 132 D. 60
Mathematics
Write the conjugate 
of the complex number z. Then find z
.z = 5 + 4i
A. 
= 5 - 4i, z
= 25 - 16i2
B. 
= 5 - 4i, z
= 25 - 16i
C. 
= 5 - 4i, z
= 41
D. 
= 5 - 4i, z
= 9
Mathematics
Solve the differential equation subject to the initial condition.2 
- 4xy = 8x; y(0) = 20
A. y = 2 + 20ex2 B. y = -2 + 22e-x2 C. y = -2 + 22ex2 D. y = -1 + 21ex2
Mathematics
Simplify the rational expression.
A. 
B. 1
C. 3
D. 
Mathematics