Find the exact value of the expression without using a calculator.
A. -2
B. - 
C. - 
D. - 
Answer: D
Mathematics
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Evaluate the integral by changing the order of integration in an appropriate way.
A. 
ln 28
B. 
ln 82
C. 
ln 28
D. 
ln 82
Mathematics
Graph the polar equation for ? in [0°, 360°).r = 4 + 4 sin ?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A building 250 feet tall casts a 90 foot long shadow. If a person stands at the end of the shadow and looks up to the top of the building, what is the angle of the person's eyes to the top of the building (to the nearest hundredth of a degree)? (Assume the person's eyes are 4 feet above ground level.)
A. 70.20° B. 21.46° C. 69.90° D. 68.54°
Mathematics
Match the system of inequalities with the appropriate graph.3x - 2y ? -6 x - 1 < 0
A. 
B. 
C. 
D. 
Mathematics