none of the above.
Fashion designers need to measure the fabric they use. They use fractions and decimals to figure how much they need.
You will need to use your brain to figure that out. Different word problems need different equations.
For the same reasons that we need to use maths today.
Because
You mean like "experts"? No, experts is plural, meaning it doesn't need an apostraphe. If you were saying something like: "That's the 'expert's' glasses" the word would be taking possesion, in that case, it would need and apostraphe. :D
No idea. But you seriously need to use spellcheck. 'Mothers' has and apostraphe before the 's'.
it'as
take a breath
A contraction has an apostraphe to signify missing letters. Similar uses of apostraphe include words with letters missing at the end, which are usially alsng, such as nothin' or ol'.
Yes
none of the above.
There is no space. If you mean a word such as "isn't" there is no space between the apostraphe and the final letter in the word.For words or names that require an apostraphe at the end of it, such as "Mr Jones'" the need for a space is only required if the word is a part of the sentance and not the end such as "It belonged to Mr Jones' cat." or "It was Mr Jones'."
Presidents is plural and possessive, so the apostrophe goes at the end: Presidents' Day.
Homicide, rape, treason, robbing, kidnapping, eluding the police, not using an apostraphe
If you are using the word zoo in the plural form, or more than one, then it does not require an apostrophe. If you refer to something that belongs to the zoo, then, yes, it requires an apostraphe.
If you want a plural, no. Correct:bear, bearscat, catscheetah, cheetahdog, dogselephant, elephantsetc.If you need a possessive, yes it needs an apostrophe. Correct:The bear's claws are large. (singular possessive) The bears' habitat is the forest. (plural possessive)The cat's whiskers are white. (singular possessive) The cats' cages need cleaned. (plural possessive)We can see the cheetah's leg is hurt. (singular possessive) The cheetahs' coats are beautiful. (plural possessive)etc.