Use your knowledge of number systems to determine whether each is true or false.
(a) 11 is a rational number.
(b) 5π is a rational number.
(c) There are exactly 3 prime numbers between 40 and 50.
(d) There are exactly 5 prime numbers less than 10.
(e) 29 is a composite number.
(f) 0 is a natural number.
(g) (5+2i)(5–2i) is a real number.
(h) 18 is a multiple of 12.
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