Extend your class Rational to include operator methods for addition, subtraction, multiplication and division, and to have friend operator << and operator >> functions for reading and printing the Rational objects. Allow cascaded input and output with the << and >> operators. Do not remove the old Add(), etc., methods. The operator >> and << friend functions need to allow you to pass in either cin or cout (as appropriate) or file handles. Write a new calculator to loop reading Rational objects and operators, exactly as before except using the << and >> operator functions to print and read the Rational objects, and using the operator methods to perform the indicated operations.

Which type of tab stop is most for weights and measurements?

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;

How should you specify box sizes on a web page if you want the boxes to vary according to the font size of the text they contain? a. in pixels b. in inches c. as percentages d. in em units