Tell whether the lines are "parallel", "perpendicular", or "neither."3x - 4y = -208x + 6y = -20
A. Neither
B. Parallel
C. Perpendicular
Answer: C
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Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the probability that the rainfall is less than the expected value of the rainfall.
A. 0.500 B. 0.447 C. 0.445 D. 0.489
Solve.Find the volume of the torus generated by revolving the circle (x - 9)2 + y2 = 1 about the y-axis.
A. 9?2 B. 18?2 C. 27?2 D. 36?2
Solve.An elliptical riding path is to be built on a rectangular piece of property that measures 10 mi by 8 mi. Find an equation for the ellipse if the path is to touch the center of the property line on all 4 sides.A = 10 miB = 8 mi 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve.A church has 7 bells in its bell tower. Before each church service 4 bells are rung in sequence. No bell is rung more than once. How many sequences are there?
A. 35 B. 840 C. 210 D. 420