Answer:
When keying a memo, the paragraphs should be double spaced.
Explanation:
Whole keying a memo or a letter, certain sets of standard rules that are to be followed to make the memo or the letter look professional. These rules are conventional and are universally accepted. These sets of standard rules for keying letters and memos are intended to dispense convenience of drafting while keying it down, and convenience of reading once it is ready.