Solve the problem.How many 4-letter codes can be formed with the letters 
if repeated letters are allowed?
A. 4096
B. 240
C. 56
D. 336
Answer: A
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Provide an appropriate response.Find all complex square roots of z = 4 + 4
i. Write each root in rectangular form.
A. 
- 
i, - 
+ 
i
B. - 
- 
i, 
- 
i
C. 
+ 
i, - 
- 
i
D. 
+ 
i, - 
- 
i
Graph the function as a solid line or curve and its inverse as a dashed line or curve on the same axes.f(x) = 4x 
A. 
B. 
C. 
D. 
Find z1z2. Express the answer in standard form.z1 = 4(cos 225° + i sin 225°)z2 = 6(cos 225° + i sin 225°)
A. -24 B. 24 C. 24i D. -24i
Solve the problem.In one U.S. town the annual consumption, b, of beef (in kg per person) can be estimated by 
where t is the number of years since 1975. Estimate the beef consumption in the year 1985.
A. About 12 kg per person B. About 15 kg per person C. About 18 kg per person D. About 24 kg per person