book Maths Puzzle Numerical Ability

Express 1 + �3i in exponential form

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book Other Question

Lynn, a chemist, mixed 40 mL of 8% hydrochloric acid with 60 mL of 12% hydrochloric acid solution. She used a portion of this solution and replaced it with distilled water. If the write a verable expression for each algebraic expression
1. c+4
2.5x
3.z2
4.a
5.6y5
6.k-3
7. 5-t
8.103