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. 
?
Answer: D
Mathematics
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Rewrite without rational exponents, and simplify, if possible.(mn)1/7
A. 
B. 
C. 
D. (mn)-7
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Find the perimeter of the figure.Rectangle 
A. 40 in. B. 42 in. C. 2 in. D. 21 in.
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List the improper fractions in the group.
, 
, 
, 
, 
A. 
, 
, 
, 
, 
B. 
, 
, 
C. 
, 
, 
, 
D. 
, 
Mathematics
Translate to an inequality.The perimeter is greater than 249.
A. x ? 249 B. x > 249 C. x ? 249 D. x < 249
Mathematics