Jeff has his first real job and decides that is a reason to go buy a new car. he has $2000 to use as a down payment, and then the dealership will require him to pay $225 per month until his car is paid off. write an equation that represents the situation. how much will you have paid off after 20 months? how many year will it take jeff to pay off the car if the car cost 15,500? write an equation that represents the situation if jeff made $250 payments each month. how many years will it take jeff to pay off the car? how much do you srill owe in 30 months?

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test