Write the indicated event in set notation.The event that Betty and Emily are selected as board members when three board members are selected at random from the following group: Allison, Betty, Charlie, Dave, and Emily. [The possible outcomes can be represented as follows.ABCABDABEACDACEADEBCDBCEBDECDE]
A. 
B. 
C. 
D. 
Answer: D
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A school board has determined that there should be 4 teachers for every 50 students. How many teachers are needed for an enrollment of 2,750 students?
A. 245 teachers B. 209 teachers C. 220 teachers D. 204 teachers E. 163 teachers
Solve the problem.Determine the better buy.Option A: 12 oz for $3.60Option B: 16 oz for $4.96
A. Not enough information B. Equal value C. Option A D. Option B
Solve.On a flight from Philadelphia to Detroit, an airplane flying against the wind flew at an average speed of 472 mph. On the return flight, the airplane flew with the wind at an average speed of 490 mph. What was the rate of the airplane in still air?
A. 478 mph B. 6 mph C. 481 mph D. 9 mph
Find the prime factorization of the composite number.1281
A. 21 ? 61 B. 32 ? 61 C. 3 ? 7 ? 61 D. 72 ? 61