Find the least common denominator (LCD).
, 
, 
A. 60x5
B. 90x20
C. 36x2
D. 180x5
Answer: D
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Estimate the sum or difference by first rounding as indicated.Estimate by first rounding to the nearest hundred.5478
A. 1745 B. 2000 C. 1700 D. 1800
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Let R, F, L, B, T, U mean rotate 90° clockwise the right, front, left, back, top, and under faces, respectively. Name the move or moves that will return the cube to standard position after making the move RF. ?
A. F-1R-1 B. R-1F-1 C. ?FR3 D. ?R2F2 E. ?FR2
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856