1. P and Q are two sets. If n (P∪Q) = 45 and n (P) = 25 and n (Q) = 35, then n (P∩Q) is A) 10 B) 12 C) 20 D) 15 2. If I is the set of positive integers and P={x:x∈I, x^2<10 and x≠0}, then A) P = {0,1} B) P = {0,1,2,3} C) P = {1.
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Neal listed the number of flowers that bloomed in his garden each week. 2, 4, 8, 16, 32, 64, ... Which formula accurately models the sequence above if a1=2? A. an=2an-1 B. an=2an-2 C. an=2an+2 D. an=2an+1
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