Find a product demonstration that educates people about a particular product. Describe that demonstration. Evaluate the demonstration by explaining whether it educated you about the product or simply tried to persuade you to buy the product. Now, design your own product demonstration about a product you would like to investigate.

When a company produces and sells x thousand units per week, its total weekly profit is p thousand dollars, where upper p equals startfraction 800 x over 100 plus x squared endfraction . the production level at t weeks from the present is x equals 4 plus 2 t. find the marginal profit, startfraction dp over dx endfraction and the time rate of change of profit, startfraction dp over dt endfraction . how fast (with respect of time) are profits changing when tequals8?