- Find the expected value for the outcome of the roll of a fair dice? Math question help!?

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Waterproject? Given the triangle ΔABC,AB=20cm,AC=12cm and angle btween AB and ACis θ Find the rate ofchange in area of triangle ABC as θ changes,when θ=45? How was science different for people at different stages? From primitive to agricultural to later and modern times? When aqueous solutions of ammonium phosphate and sodium nitrate are combined.The net ionic equation for this reaction is pls help? I got a trouble of solving this...plzzz help?