On a planet far, far away, Luke finds himself in a strange building with hexagon-shaped rooms as shown in the figure below. In his search for the princess, he always moves to an adjacent room and always in a southerly direction. How many paths are there to room 13?
?
?
A. 381 paths
B. 378 paths
C. 375 paths
D. 377 paths
E. 256 paths
Answer: D
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Solve the differential equation.y ' + y tan x = cos x, -?/2 < x < ?/2
A. y = x cos x + C cos x, -?/2 < x < ?/2 B. y = x cos x + C sin x, -?/2 < x < ?/2 C. y = x sin x + C sin x, -?/2 < x < ?/2 D. y = x sin x + C cos x, -?/2 < x < ?/2
Solve the problem.A reflecting telescope contains a parabolic mirror. If the mirror is 16 inches across at its opening and is 2 feet deep, where will the light be concentrated?
A. 0.7 in. from the vertex B. 0.1 in. from the vertex C. 0.3 in. from the vertex D. 8 in. from the vertex
Find the equation of the line in slope-intercept form. 
A. y = - 3x - 14
B. y = - 3x + 14
C. y = - 3x - 2
D. y = - 
x - 
Find decimal notation.- 
A. -2.25
B. -0.
C. -0.225
D. -1.125