1. Knowledge/Understanding [8, 6, 6 marks] a) Write each of the following as a single power. (2x29) i) (2* 2) ii) 39x34 5x5 iii) 66 iv) 36 5'x52 b) Evaluate each of the following: i) 24 +22 ii) 32 +3 9 iii) 92 +252 c) Simplify each of the following. Express all answers with positive exponents if possible. 1) (2x)(-7x) ii) -45xy'z' 9xyz iii) (2010)-5 (24-26 J 4+26