Find the product. Write the product in rectangular form, using exact values.[7(cos 120° + i sin 120°)] [2(cos 90° + i sin 90°)]
A. 14 - 14
i
B. 7
- 28 i
C. -7
- 7 i
D. 5
- 
i
Answer: C
Mathematics
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Add or subtract and write answer in lowest terms.
- 
A. 
B. 
C. 
D. 
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Evaluate the expression.61
A. 
B. 6
C. 1
D. -6
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Find the perimeter. Use 3.14 for ? when needed.
A. 20.56 cm B. 6.28 cm C. 12.56 cm D. 16.56 cm
Mathematics
Perform the indicated operation.3.12 - 1.242
A. 4.362 B. 1.878 C. 5.362 D. 1.978
Mathematics