The following data represents the percentage of the population in a certain country aged 40 or older whose age is x who do not have a college degree of some type. No college degree:C(x) Age: x
25.4 40
23.2 45
21.8 50
24.5 55
26.1 60
29.8 65
Find a quadratic model that describes the relationship between age, x, and the percentage of the population that do not have a college degree. Use the model to predict the percentage of 53-yr-olds that do not have a college degree

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

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