The histogram shows the scores of each participant in a game from a total of 100 participants. 
How many more participants scored 40-59 than 20-39?
A. 22 participants
B. 13 participants
C. 9 participants
D. 10 participants
Answer: B
Mathematics
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Solve the problem.There are 6 singers in a competition. In how many ways can first, second, and third prizes be awarded?
A. 18 B. 20 C. 216 D. 120
Mathematics
150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 65 and standard deviation ? = 10.The average score on the exam was approximately
A. 65. B. 75. C. 50. D. 10. E. none of these
Mathematics
Write an equation of the line through the given point with the given slope. Write the equation in slope-intercept form.(4, 3); slope: - 
A. y = - 
x + 
B. y = - 
x - 
C. y = - 
x + 
D. y = - 
x + 
Mathematics
Factor by any method.y2 - 
A. 
B. 
C. 
D. 
Mathematics