Simplify the expression.
A. 2
B. 
C. 8
D. 
Answer: D
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Determine whether the study involves selection bias, participation bias, both selection bias and participation bias, or neither.You are interested in the percentage of people in your city who favor tax cuts. You interview every twentieth person as they leave the church in your neighborhood.
A. Participation bias and selection bias B. Selection bias C. No bias D. Participation bias
For the triangle, based on the side lengths given, decide whether it is equilateral, isosceles, or scalene. 
A. equilateral and isosceles B. scalene C. isosceles
Use I = Prt for simple interest to find the indicated quantity.P = $13,500; t = 4 months; I = $517.50. Find r.
A. 11.7% B. 7.7% C. 3.8% D. 11.5%
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107