Find any modes that exist.20, 42, 46, 42, 49, 42, 49
A. 41.4
B. 49
C. 42
D. 46
Answer: C
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Solve the problem.The time in hours it takes a satellite to complete an orbit around the earth varies directly as the radius of the orbit (from the center of the earth) and inversely as the orbital velocity. If a satellite completes an orbit 
above the earth in 
at a velocity of 
how long would it take a satellite to complete an orbit if it is at 
/> above the earth at a velocity of 
(Use 
as the radius of the earth.)
A. 31.59 hr
B. 4.45 hr
C. 14.25 hr
D. 142.53 hr
Solve.y = 3 ? 7
A. 21 B. 210 C. 31 D. 19
Use a cross product to determine whether the points A, B, and C are collinear.A(2, 3, 2), B(7, 5, 0), C(-3, 1, 4)
A. Let u = 
= 
and v = 
= 
. The vectors u and v are not parallel because they share point A, and A, B, and C are collinear, since u × v = 0.
B. Let u = 
= 
and v = 
= 
. The vectors u and v are not parallel because they share point A, and A, B, and C are not collinear, since u × v ? 0.
C. Let u = 
= 
and v = 
= 
. The vectors u and v are parallel, and A, B, and C are collinear, since u × v = 0.
D. Let u = 
= 
and v = 
= 
. The vectors u and v are not parallel because they share point A, and A, B, and C are not collinear, since u × v ? 0.
Graph.y = -x2 + 2x - 8
A. 
B. 
C. 
D. 