Sreative section - A a) b) Derive that the area of an equilateral triangle is v3 (side)”. Derive that the area of an isosceles triangle is 4 9 14p– q, where p is the length of each of two equal sides and q is the length of the base. If x, y, z are the three sides and s is the semi-perimeter of a triangle, derive that its area is Vs(s - x) (s - y) (s – z). c) - 83 Vedanta Excel in Mathematics - Book 10 32 Sca.. Date : Page: lala

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