The plural is corporations. The plural possessive is corporations' (apostrophe only).
Customers' is the correct plural possessive. Customer's is a singular possessive.
The singular possessive is hostess's; the plural possessive is hostesses'.
The singular possessive form for the noun corporation is corporation's.Example: The corporation's headquarters is located in New Jersey.
The plural possessive form for the noun company is companies'.
The plural form of the noun office is offices.The plural possessive form is offices'.Example: All of our offices' decor is the same using the company colors.
The word zoo's is the singular possessive (refers to one zoo).The plural is zoos and the plural possessive is zoos' (e.g. The zoos' directors agreed to merge them into a single state corporation.)
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The correct form is "its" for the possessive form in the plural. "Its" is used for both the singular and plural possessive forms, without an apostrophe.
The plural is briefs. The plural possessive is briefs'.
The plural is lads. The plural possessive is lads'.
The plural is trollies. The plural possessive is trollies'.
The plural is relatives. The plural possessive is relatives'.
The plural is stations. The plural possessive is stations'.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is homes; the plural possessive is homes'.
The plural of rose is roses. The plural possessive is roses'.