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Write an SQL query to find the average value of orders placed by customers located in the United States who have made at least 3 orders over the past month, by joining the "orders" and "customers" tables.

Have you ever encountered multicollinearity in your own work? How did you address it?

Tell me about a time you've had to change the way you work.

What is the method to rebuild a binary tree from preorder and inorder traversal data?

Write a function to find the problematic integer in an array of sorted integers from 0 to n. Your algorithm should have a time complexity of O(log n).

You may choose to forfeit your previous earnings and roll another die. When should you roll the second time?

How would you query a database in SQL to return rows that start with 'H'?