Persevere with Problems The diagram shows one wall of Sadie's living room. a. This wall needs to be painted. Find the total area to be painted. b. Each quart of paint costs $8 and covers 90 square feet. Find the total cost to paint this wall once. Justify your answer.

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