exam Maths Puzzle Numerical Ability

Simplify: e^ln 72
Im guessing this is exponential form but im not sure

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exam Other Question

http://img233.imageshack.us/img233/2087/geometrygy6.jpg

Referring to that picture,

1) If AD = 12 and AC = 4Y - 36, Find the value of y. Then find AC and DC.

2) If ED = x + The measures of two cmplementary angles are 12q-9 and 8q+14. Find the measures of the angles.