Fill in the missing statements or expressions in the following code that checks to ensure that a user enters an integer value at the prompt: var purchase = parseInt(prompt("How many do you want?"," ")); var check = ; while () { purchase = parseInt(prompt("Enter a whole number:", " ")); ; }

Which requirement is an appropriate reason for a business to use it tools

All of the following are characteristics that must be contained in any knowledge representation scheme except

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;