Assume that in 2005 consumers used credit and debit cards to pay for 40 % of all purchases. this percentage is projected to be 55 % in 2011 . find a linear function that models the data, where x is the year and p(x) is the percentage.

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events