Simplify the radical.
A. x6
B. x12
C. x12
D. x6
Answer: D
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Write 2.18 × 100 as a decimal number.
A. 2.18 B. 2180 C. 218 D. 0.218
Factor when possible.x2 - 4xy - 21y2
A. (x - 3y)(x + y) B. (x + 3y)(x - 7y) C. (x - 3y)(x + 7y) D. Prime
Solve the problem.The owners of a candy store want to sell, for $6 per pound, a mixture of chocolate-covered raisins, which usually sells for $3 per pound, and chocolate-covered macadamia nuts, which usually sells for $8 per pound. They have a 
barrel of the raisins. How many pounds of the nuts should they mix with the barrel of raisins so that they hit their target value of $6 per pound for the mixture?
A. 91 lb B. 98 lb C. 105 lb D. 112 lb
Solve the given equation for the indicated variable.M = ?r2hd for r
A. r = ±
B. r = 
C. r = 
D. r = 