The usual toll charge to use the bingham tunnel is 50 cents. if you pur-

chase a special sticker for $5.50, the toll is only 35 cents. at least how

many trips through the tunnel are needed before the sticker costs less than

paying for each trip separately?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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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