Give the domain of the function.f(x) = (-x - 9)1/2
A. [-9, ?)
B. (-?, -9]
C. (-?, 9]
D. [9, ?)
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = (7 cos t)i + (7 sin t)j + 7tk, 0 ? t ? 2?; ? = 4
A. 14?
units
B. 392?
units
C. 8? units
D. 56?
units
Mathematics
Simplify. Assume that all variables represent positive numbers.
A. 8k7q8 
B. 8k3q4 
C. 8q4 
D. 8k3q4 
Mathematics
Solve.- 
k = 
A. 7 B. -4 C. 6 D. -1
Mathematics
Factor completely. If the polynomial is prime, state so.t3 + 1000
A. (t - 1000)(t + 1)(t - 1) B. (t + 10)(t2 - 10t + 100) C. (t + 10)(t2 + 100) D. (t - 10)(t2 + 10t + 100)
Mathematics