Find the domain of the function.f(x) = 
A. {x|x ? 21}
B. {x|x ? 21}
C. {x|x ? 
}
D. {x|x ? 
}
Answer: B
Mathematics
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Find projv u.v = k, u = 6i + 9j + 2k
A. 
i + 
j + 
k
B. 
i + 
j + 
k
C. 2k
D. 
k
Mathematics
Decide if the set is finite.{the hairs on your head}
A. Infinite B. Finite
Mathematics
Approximate the value using a calculator. Express answer rounded to three decimal places.e3.93
A. 50.907 B. 15.154 C. 10.683 D. 41.279
Mathematics
For the pair of functions, perform the indicated operation.f(x) = x2 + 1, g(x) = 2x - 7
Find (f ? g)(x).
A. 2x3 + 2x2 - 7x - 7 B. 2x2 + 2x - 7 C. 2x3 - 7x2 + 2x - 7 D. 2x3 - 7
Mathematics