A colony of Escherichia coli is inoculated from a Petri dish into a test tube containing 50 mL of nutrient broth. The test tube is placed in a 37°C incubator/shaker; after one hour, the number of bacteria in the test tube is determined to be . Given that the doubling time of E. coli is 20 minutes with agitation at 37°C, approximately how many bacteria should the test tube contain after eight hours of growth?

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.