Determine if the set is the empty set.{0, ?}
A. Yes, it is the empty set.
B. No, it is not the empty set.
Answer: B
Mathematics
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Solve the problem.At a plant that packages bottled spring water, the water is passed through a sequence of ion-exchange filters to reduce the sodium content prior to bottling. Each filter removes 65% of the sodium present in the water passing through it. Determine the number of filters that must be used to reduce the sodium concentration from 21 parts-per-million to 0.43 parts-per-million.
A. 11 filters B. 12 filters C. 9 filters D. 10 filters
Mathematics
Multiply the rational expressions.
? 
A. -1
B. 
C. 
D. 
Mathematics
Solve.t2 - 6 = -
A. ±
, ±
B. ±
C. ±
D. 
, 
Mathematics
Graph the inequality.y < ln (x + 3)
A. 
B. 
C. 
D. 
Mathematics