Data task 79: A New Zealand Level 3 learner evaluates evidence and justifies a conclusion in a complex context. A revenue model is R(x)=−2(x−18)²+280. At what x is revenue maximised?

Data task 79: A New Zealand Level 3 learner evaluates evidence and justifies a conclusion in a complex context. A revenue model is R(x)=−2(x−18)²+280. At what x is revenue maximised?

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