exam Maths Puzzle Numerical Ability

The profit for a tractor company, which sells tractors, is P(n)=3.2n^2+6n-3, where n is the number of tractors sold and P(n) is in hundreds of dollars.
a) Find the profit when 6 t

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exam Other Question
Under what condition is the graph of a function f(x) said to be symmetric with respect to the y-axis. Tell whether a triangle with the sides of the given lengths is 45°-45° -90°, 30° -60° -90° or neither.

11, 22, 19.1