At today's visit to her doctor, Josephine was prescribed a liquid medication with instructions to take 25 cc's every four hours. She filled the prescription on her way to work, but when it came time to take the medicine, she realized that the pharmacist did not include a measuring cup. Josephine estimated that the plastic spoon in her desk drawer was about the same size as a teaspoon and decided to use it to measure the approximate dosage. She recalled that one cubic centimeter (cc) is equal to one milliliter (mL) but was not sure how many milliliters were in a teaspoon. So, she noted that a two-liter bottle of soda contains about the same amount as a half-gallon container of milk and applied her knowledge of the customary system of measurement to determine how many teaspoons of medicine to take. Which of these calculations might she have used to approximate her dosage?

The Praxis Mathematics (5165 ) Exam is a test required by many states for credential candidates planning to teach mathematics at the high school level. It is a single, computer-delivered test that includes questions from two content categories.

The first content category includes Number and Quantity, Algebra, Functions and Calculus. The second content category includes Geometry, Probability and Statistics, and Discrete Mathematics.

The test consists of various question types including selected-response, numeric entry, drag-and-drop and text completion.