Problem 27E

In Problems 27–29, determine the values of r for which det (A – rI) = 0.

Chapter 2 What is a theory A theory is a set of related ideas that have applications. o Think about the theory of gravity. What is gravity It is the force that holds us down because we have mass. In other words, an object that has mass has an attractive force. Therefore, the bigger the mass the stronger the force. o This theory emphasizes the relationship between two or more concepts. Scientific Method – the closest thing to instinct that we have Infants explore things – their curiosity drives them. What do they do 1. Ask a question 2. Research 3. Hypothesis 4. Choose method (observation, survey, experiment, etc.) 5. Collect data 6. Analyze