Answer the question.A teacher gives the same math exam to two different classes. The second class has more students than the first. The mean score for the first class is 50% and the mean score for the second class is 70%. What can you say about the mean score for both classes combined?
A. It is equal to 60%.
B. It is higher than 60%.
C. It is lower than 60%.
D. It may be higher or lower than 60%, this cannot be determined from the information given.
Answer: B
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = -4 + 11 cos tFind the body's acceleration at time t = ?/3 sec.
A. 
m/sec2
B. - 
m/sec2
C. 
m/sec2
D. - 
m/sec2
Find the indicated premium. Round to the nearest cent. 
Find the total premium paid over 30 years for a universal life policy with a face value of $35,000. Assume the policy is taken out by a 25-year-old man.
A. $5,313.00 B. $5,365.50 C. $2,709.00 D. $5,040.00
Solve the absolute value inequality. Write the solution set using interval notation.
? 15
A. (-?, 15] B. [-15, 15] C. (-?, -15] D. (-?, -15] ? [15, ?)
Find the set if the universal set U = {-8, -3, -1, 0, 2, 4, 5, 6, 7, 9}, A = {-8, -3, -1, 2, 5}, B = {-3, 2, 5, 7}, and C = {-1, 4, 9}.A ? B
A. {-3, 2, 5, 7} B. {-8, -3, -1, 2, 5} C. {-3, 2, 5} D. {-8, -3, -1, 2, 5, 7}