Graph the system of inequalities.y ? 4 sin xy < 00 ? x ? 3?
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Evaluate the integral.
A. 
B. 
C. 
D. 
Mathematics
In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer TV in a school of 450 students?
A. About 12 students B. About 90 students C. About 54 students D. About 81 students
Mathematics
Evaluate the improper integral.
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation.A factor used in measuring the loudness sensed by the human ear is 
0.3, where I is the intensity of the sound and I0 is a reference intensity. Evaluate this factor for I = 3.3 × 10-6 W/m2 and I0 = 1.0 × 10-12 W/m2 to two significant digits.
A. 0.011 B. 0.023 C. 44 D. 90
Mathematics