Evaluate the radical expressions or indicate that the root is not a real number.
A. -4
B. 4
C. 64
D. not a real number
Answer: B
Mathematics
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Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 
?
B. 
?
C. 6?
D. 
?
Mathematics
Perform the indicated operation. Simplify your answers. 
- 
A. 
B. 
C. 
D. 
Mathematics
Find the mean for the given sample data.Frank's Furniture employees earned the following amounts last week:
What was the mean amount earned by an employee last week? Round your answer to the nearest cent.
A. $390.50 B. $297.06 C. $341.69 D. $303.72
Mathematics
Simplify the expression.(-243)1/5
A. -27 B. 81 C. 3 D. -3
Mathematics