Find the focus and directrix of the parabola.x2 = 16y
A. (0, 4); y = -4
B. (0, -4); x = - 4
C. (4, 0); y = 4
D. (4, 0); x = 4
Answer: A
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Find the absolute extreme values of the function on the interval.f(x) = |x - 5|, 3 ? x ? 8
A. absolute maximum is 3 at x = 8; absolute minimum is 2 at x = 3 B. absolute maximum is -2 at x = 3; absolute minimum is 3 at x = 8 C. absolute maximum is 3 at x = 8; absolute minimum is 0 at x = 5 D. absolute maximum is 2 at x = 3; absolute minimum is 0 at x = 5
Simplify using order of operations.-7 + 6(5 - 9)
A. 4 B. 31 C. -4 D. -31
Determine which of the sets of vectors is linearly independent.A: The set 
in C[0, 1]B: The set 
in C[0, 1]C: The set 
in C[0, 1]
A. B only B. A and C C. A and B D. A only E. C only
Express the product as a sum containing only sines or cosines.sin(7?) cos(3?)
A. 
[sin(10?) + cos(4?)]
B. 
[cos(10?) - cos(4?)]
C. sin cos(21?2)
D. 
[sin(10?) + sin(4?)]