Khloe and her children went into a movie theater where they sell bags of popcorn for $7 each and candies for $4 each. Khloe has $60 to spend and must buy no less than 11 bags of popcorn and candies altogether. If xx represents the number of bags of popcorn purchased and yy represents the number of candies purchased, write and solve a system of inequalities graphically and determine one possible solution

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