Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = -2 and x = 2. The cross sections perpendicular to the x-axis are circles whose diameters stretch from the curve 
to the curve 
A. 
?2
B. 25?2
C. 25?
D. 
?2
Answer: A
Mathematics
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Use the sinking fund formula to determine the payment needed to reach the accumulated amount. Round the answer to the nearest cent.Annual payments with 8% interest compounded annually for 9 years to accumulate $5700
A. $228.11 B. $456.45 C. $535.88 D. $393.47
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Write the fraction in lowest terms.
A. 
B. 
C. 
D. 
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Graph the system of inequalities.x + 9y ? 9x + 9y ? 0
A. 
B. No solution
C. 
D. 
Mathematics
Express the number in scientific notation.3,100,000
A. 3.1 × 10-6 B. 3.1 × 10-7 C. 3.1 × 107 D. 3.1 × 106
Mathematics