1. The Mississippi River measures 29 inches in length on a United States map. The map scale
indicates - inch equals 20 miles. Based on the
map scale, what is the actual length of the
Mississippi River?
A. 580 miles
B. 1,160 miles
C. 2,320 miles
D. 2,900 miles

Quick hurry please

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