1. Show the prime factorisation of the following numbers using the factor tree.
a) 72 b) 108
c) 160
d) 216
e) 305
920
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Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”

1.0 larger it be exact