Solve the problem.The time of a telephone call (in minutes) to a certain town is a continuous random variable with a probability density function defined by 
for 
Find the probability that the call lasts between 1 and 3 minutes.
A. 0.9959
B. 0.0041
C. 0.8709
D. 1.0041
Answer: A
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Write one or more inequalities that describe the set of points.The half-space consisting of the points on and in front of the yz-plane
A. y ? 0, z ? 0 B. x ? 0 C. y ? 0, z ? 0 D. x ? 0
Solve the problem.A satellite is to be put into an elliptical orbit around a moon. The moon is a sphere with radius of 99 km. Determine an equation for the ellipse if the distance of the satellite from the surface of the moon varies from 192 km to 986 km.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Write interval notation for the graph.
A. (-6, ?) B. [-6, ?) C. (-?, -6) D. (-?, -6]
Solve the problem.If (4, -7) is the endpoint of a line segment, and (-1, -5) is its midpoint, find the other endpoint.
A. (8, -17) B. (14, -11) C. (-6, -9) D. (-6, -3)