1. A formula is

(a) The amount of each value needed.

(b) A solution for problems.

(c) An equation usually expressed in letters and numbers.

2. Subscripts are

(a) The same as exponents.

(b) Used to shorten what must be written.

(c) Used to make a problem look hard.

3. A working equation

(a) Is derived from the basic equation.

(b) Is totally different from the basic equation.

(c) Comes before the basic equation in the problem.

(d) None of the above.

4. Cite two examples in industry in which formulas are used.

5. How are subscripts used in measurement?