Create a query calculating the profit margin of bike models (use Production. ProductCategory. Name to determine if the product is a bike.) Profit margin is the difference between ListPrice and StandardCost divided by the ListPrice. Only consider bike models currently sold (Use DiscontinuedDate in Production. Product.) Your output should contain the following columns, with models exhibiting the greatest profit margins listed first. ProductModelID
Product Name
Profit Margin (expressed as a two-digit decimal. For example a 93% profit margin will be displayed as 0.93)

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;

Write an essay on online collaboration, how to do it, the challenges, resolving the challenges, and consider whether the risks are greater than rewards. ( need )

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