Assume you are writing a program that calculates a user's total order cost that includes sales tax of 6.5%. list three advantages of using a named constant to represent the sales tax instead of simply entering 0.065 each time the tax is required in the code?

Ulia is planning to attend the same private four-year college her parents attended. she wants to save at least $18,000 in four years to contribute to her college education. which monthly deposit amounts can julia use to achieve her goal? check all that apply.