What is the difference between atomic number and mass number?
Atomic number is simply is the number of protons in the nucleus of an atom, which is how an element is determined. Mass number then is just the sum of protons and neutrons within the atoms nucleus.
What is the difference between Calculus 1,2, and 3?
Calculus 1 mainly deals with your basic 2-D calculus and introduction to derivatives and integrals. Calc 2 takes on more advanced integrals and introduces students to differential equations, sequences and series. And finally calc 3 is basically calc 1 but applied to three dimensions.
How are variables used in algebraic equations?
Variables are essentially used as placeholders in algebra in order allow us to solve complex equations. Most questions might ask to solve for the variable in which case we would want to isolate it by itself on one side of the equation in order to find its correct value.