In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Plants are _ feet apart with ten feet between rows.
[EX A]: four

[EX Q]: Monsoons coming every three to _ years can add almost a foot of water to the mountain's surface.
[EX A]: seven

[EX Q]: Synthetic waxes can last six to _ months or longer and typically wipe on and off easily.
[EX A]:
nine