Perform the indicated operation(s), whenever possible.Let A = 
and B = 
. Find A - B.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Solve the problem.The cost of manufacturing clocks is given by c = 121
, where c is the total cost and n is the number produced. What is c when no clocks are produced?
A. $121 B. $484 C. $1936 D. $44
Mathematics
Find the Cartesian product or cardinal number as requested.A = {15, 3, 10}B = {5, 12}Find n(A × B).
A. 6 B. 9 C. 12 D. 5
Mathematics
Determine if the argument is valid.All astronauts are healthy.Lawrence is not healthy. 
A. Invalid B. Valid
Mathematics
Use half-angle identities to find the exact value of the expression.cos 
A. 
B. 
C. 
D. 
Mathematics