Use the vectors 
, 
to find the indicated quantity. State whether the result is a vector or a scalar.
?
?
A. 
; vector
B. -2; scalar
C. 2; scalar
D. 
; vector
E. 0; scalar
Answer: E
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Find the focus and the directrix of the parabola.y = 2x2 - 8x + 7
A. Focus: 
; directrix: y = - 
B. Focus: 
; directrix: y = - 
C. Focus: (2, 7); directrix: x = 9
D. Focus: (2, 1); directrix: x = -3
Multiply.
A. 2,499,010 B. 2,510,010 C. 2,500,110 D. 2,500,010
Find the equation of the parabola with the given properties.Vertex: (-2, -3); vertical axis of symmetry; containing the point (-4, 13)
A. 
(y + 3) = (x + 2)2
B. 
(x + 3) = (y + 2)2
C. 
(y + 2) = (x + 3)2
D. 
(x + 2) = (y + 3)2
The function gives the distances (in feet) traveled in time t (in seconds) by a particle. Find the velocity and acceleration at the given time.s = -9t3 + 4t2 + 4t - 9, t = 3
A. v = -215 ft/s, a = -154 ft/s2 B. v = -57 ft/s, a = -215 ft/s2 C. v = -154 ft/s, a = -215 ft/s2 D. v = -215 ft/s, a = -57 ft/s2