Consider an ERD for a beauty salon in which there is a superclass entity EMPLOYEE with four subclasses:
CASHIER, HAIR_STYLIST, NAIL_TECH, and MANAGER.
A HAIR_STYLIST is a specialization of EMPLOYEE and can also inherit from the MANAGER class. Which of the following terms best describes the relationship between HAIR_STYLIST, EMPLOYEE, and MANAGER?
O multiple inheritance
O tree structure
O single inheritance
O partial and disjoint

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;

What are some settings you can control when formatting columns?

Using a conditional expression, write a statement that increments numusers if updatedirection is 1, otherwise decrements numusers. ex: if numusers is 8 and updatedirection is 1, numusers becomes 9; if updatedirection is 0, numusers becomes 7.