Find the vertex, focus, and directrix of the parabola.x2 = 16y
A. Vertex: V(0, 0); focus: F(4, 0); directrix: x = 4
B. Vertex: V(0, 0); focus: F(0, -4); directrix: x = - 4
C. Vertex: V(0, 0); focus: F(4, 0); directrix: y = 4
D. Vertex: V(0, 0); focus: F(0, 4), directrix: y = -4
Answer: D
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; b = 3
A. y = 
x + 3
B. y = - 
x + 3
C. y = 
x - 3
D. y = - 
x - 3
Determine the number of figures (of any size) in the design.Triangles (of any size)
A. 10 B. 9 C. 14 D. 12
Solve the problem.Scores on a certain test have been found to be distributed normally with a mean of 64 and a standard deviation of 13. What is the standard error in the mean for all samples of 196 test scores?
A. 0.929 B. 0.657 C. 0.066 D. 4.571
Factor the trinomial by grouping.3x4 - 8x2 + 9x2 - 24
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