The total cost for a bowling game includes the fee for the shoe rental plus a fee per game. the cost of each game increases the price by $4. after 3 games, the total cost with the shoe rental is $14.
a: write an equation to represent the total cost y to rent shoes and bowl x number of games.
b: how much is the shoe rental?

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias