A friend proudly boasts to you that his password is the day of the year that he was born, but converted to binary. You know he was born on the (135th) day of the year. What is his password?

One subtask in the game is to roll the dice. explain why is roll the dice an abstraction.

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)?

The more powerful, 60 volt cables and the main power shut-off on an hev are both colored orange.