Simplify the expression. Assume all variables represent positive real numbers.(
+ 4)(
- 4)
A. 22
B. 2
C. -10
D. 6 - 2
Answer: C
Mathematics
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A. -44 B. 44 C. 1054 D. -1054
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Write 2.18 × 100 as a decimal number.
A. 2.18 B. 2180 C. 218 D. 0.218
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Evaluate the given binomial coefficient.
A. 
B. 6
C. 1
D. 6!
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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find cos 
.
A. - 
B. 
C. 
D. - 
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