Which statements are correct about quadrilaterals? choose all answers that are correct.   a. all squares are rhombuses.   b. all rectangles are parallelograms.   c. all rhombuses are trapezoids.   d. all 4-sided shapes have at least one pair of parallel sides.

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

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