Find the probability of the compound event.An urn contains balls numbered 1 through 15. A ball is chosen, returned to the urn, and a second ball is chosen. What is the probability that the first and second balls will be a(n) 8?
A. 
B. 
C. 
D. 
Answer: A
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Determine whether the graph is a tree.In order to study the way that people react to strangers, a psychologist conducts an interesting experiment. Without any instructions as to the nature of the experiment, one hundred strangers are led into a large room in which refreshments are being served and music is playing. The psychologist draws a graph in which each vertex represents a subject and she draws an edge between pairs if the pair engages in conversation and if this conversation is the first conversation for at least one member of the pair. Must the resulting graph be a tree?
A. No B. Yes
Is the function graphed one-to-one?
A. No B. Yes
R1 = 2.2 Kê, R2 = 3.3 Kê, RL = 1.2 Kê, and E = 20 V. Find GN.
a. 366 æS
b. 454 æS
c. 757 æS
d. 576 æS
e. 392 æS
Graph the line containing the given pair of points and find the slope. (2, -10) (-1, 5)
A. - 
B. - 5
C. 5
D. 
