Which element of a business document provides additional information but is not a part of the body of the text?

1. subject
2. footer
3. salutation
4. closing note

Write a method replacekey in the minheap class with the following signature: public void replacekey(integer oldkey, integer newkey) the method will replace the first occurrence of oldkey with the newkey, and restore the min-heap property after the change. if the oldkey does not exist in the heap, the method prints an appropriate message and returns without changing the heap. example: suppose our binary heap object (bh) has the following keys: *** 4 6 7 32 19 64 26 99 42 54 28 then the method call: bh.replacekey (oldkey integer(54), newkey integer(2))

Which of the following had the greatest influence on opening the internet to the generly public

What are "open-loop" and "closed-loop" systems