The library is designing a book display with fiction books 28 biographies and 40 non fiction books. each shelf will have only one type of book on it. sheena says she can put 5 books on each shelf. she listed the common factors of 20,28,and 40 below to support her reasoning

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Write 5 in the form of a/b using integers to show it as a rational number

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