Solve.Amy teaches Chinese lessons for $55 per student for a 6-week session. From one group of students, she collects $1,650. Find how many students are in the group.
A. 30 students
B. 20 students
C. 32 students
D. 34 students
Answer: A
Mathematics
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Determine whether the improper integral converges or diverges.
A. Converges B. Diverges
Mathematics
Solve the problem.A trough is to be made with an end of the dimensions shown. The length of the trough is to be 
long. Only the angle ? can be varied. What value of ? will maximize the trough's volume?
A. 13° B. 30° C. 47° D. 32°
Mathematics
Solve the equation on the interval 0 ? ? < 2?.cos2 ? - 1 = 0
A. 
B. 
C. {0}
D. {0, ?}
Mathematics
Add.-12 + (-10)
A. 22 B. -22 C. -2 D. 2
Mathematics