Design an abstract class GeometricObject with lineColor as data member. GeometricObject must ensure that its children implement calcArea() method. Design Rectangle and Circle classes as children of GeometricObject class with overridden toString() method to return “ Rectangle with ‘w’ width and ‘h’ height is drawn” OR “Circle with ‘r’ radius is drawn”. - The attribute of Rectangle are length and width - The attribute of Circle is radius *Hint: Area of Circle= πr2 Area of Rectangle=w*l

When you mouse over and click to add a search term this(these) boolean operator(s) is(are) not implied. (select all that apply)?

People with high self-esteem: accept their strengths and weaknesses. believe that failed experiences are failures of their whole self. feel good about who they are only when they reach total success. need positive external experiences to counteract negative feelings that constantly plague them.

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?