Rewrite the radical expression using rational exponents. Assume all variables represent nonnegative real numbers.
A. (x5yz7)1/2
B. (x5yz7)-2
C. x3y-1z5
D. (x5yz7)2
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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A. 54 B. 28 C. 16 D. 70
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Solve the problem, using 3.14 for ?. Round to nearest tenth unless instructed differently.The striking circle in field hockey is a semicircle with a radius of 15.5 yd. Find the area of the semicircle.
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