Find the reciprocal, if it exists.
A. - 
B. 1
C. 
D. - 
Answer: C
Mathematics
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Find the products AB and BA to determine whether B is the multiplicative inverse of A.A = 
,B = 
A. B = A-1 B. B ? A-1
Mathematics
Use the root test to determine if the series converges or diverges.
A. Diverges B. Converges
Mathematics
Evaluate the expression.
A. -20 B. 12 C. -2 D. 2
Mathematics
Find the area of a sector of a circle with radius r and central angle ?. Round your answer to one decimal place.? = 
, r = 5.0 ft
A. 5.2 ft2 B. 11.0 ft2 C. 52.4 ft2 D. 26.2 ft2
Mathematics