Decide whether the given set of numbers is a commutative group under the given operation.Natural numbers; addition
A. Yes
B. No
Answer: B
Mathematics
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Express the vector as a product of its length and direction.12i - 4j - 18k
A. 22(i - j - k)
B. 22
C. 22
D. 22
Mathematics
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
Mathematics
Find the equation of the hyperbola satisfying the given conditions.Vertices at (0, ±6); asymptotes y = ± 
x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Represent the shaded area in the figure group with an improper fraction.
A. 
B. 2
C. 
D. 1
Mathematics