1. A geometric series has first term 2 and sum to infinity 5.
1)Find the common ratio.

2)Find the sum of the first 10 terms of the series.

Corresponding angles are a. always b. sometimes c. never congruent

Measure a and b and find their sum. how are the angles related?

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