Find the Cartesian product or cardinal number as requested.A = {0}B = {11, 21, 31}Find B × A.
A. {0}
B. {0, 0, 0}
C. {(11, 0), (21, 0), (31, 0)}
D. {(0, 11), (0, 21), (0, 31)}
Answer: C
Mathematics
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Determine whether the Fourier series of the given function will include only sine terms, only cosine terms, or both sine terms and cosine terms.f(x) = 
A. both sine and cosine terms B. only cosine terms C. only sine terms
Mathematics
Solve.A stock broker is paid 
per month plus 
of the total sales of stocks that she sells. Last month Cora sold $228,000 worth of stock. What was her total income for the month?
A. $114,550 B. $11,950 C. $11,400 D. $114,000
Mathematics
Refer to the figure in which 
? 
and 
? 
If AC = 30 ft and AB = 24 ft, find AD.
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Solve the equation.(10 - 0.8x)(5 - 0.4x) = 0
A. 10, 5 B. 12.5, 12.5 C. 12.5, 0.2 D. 0.8, 5
Mathematics