exam Maths Puzzle Numerical Ability

Based on your observation list out 4 points on the characteristics of logarithmic or exponential functions and their graphical representation.

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An air sample 4.0 ppm (parts per million) of two pollutants. The concentration of one is four times the other. What are the concentrations? What would be the rule for finding any term in

107, 105, 103, 101....

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