Solve the problem.The five sales people at Southwest Appliances earned commissions last year of $19,000, $35,000, $41,000, $13,000, and $34,000. Find the average commission.
A. $31,240
B. $29,820
C. $28,400
D. $26,980
Answer: C
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Shade the Venn diagram to represent the set.A' ? B'
A. 
B. 
Solve the problem.If each square represents one square unit, estimate the area of the shaded figure in square units.
A. 7 square units B. 6 square units C. 8 square units D. 10 square units
In order to determine the effects of a new pill that is supposed to reduce hair loss, a researcher conducts a study. Five hundred volunteer subjects (300 men and 200 women) all of which suffer some degree of hair loss are selected to participate in the study. The researcher gives the women the real pill and the men a sugar pill, but only the researcher knows this.In the experiment, which is the placebo group?
A. the 200 women B. the 300 men C. the subjects that responded to the treatment D. There is no placebo group. E. none of these
Solve the problem.If a and b are the lengths of the legs of a right triangle and c is the length of the hypotenuse, 
How is dc/dt related to da/dt and db/dt?
A. 
= 2a
+ 2b
B. 
= a
+ b
C. 
= 
D. 
= a2
+ b2