Suppose a retail business is planning to have a storewide sale where the price of all items will be 20 percent off. You have been asked to write a program to calculate the sale price of an item in two decimal points after the discount is subtracted and print the result to the console. Use a constant variable to store the discount rate of 20 percent.

Explain briefly why you cannot expect to find a previous version of every file with which you work.

What is added to the < meta > tag to describe the encoding type?

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why. a.) student. course. callnum = "csc230"; b.) cin > > student. name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student. name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist. course. credits = 3; j.) course = studenttype. course;