First, please let me correct you. The punctuation mark to which you refer is a hyphen, not a dash. I'd be happy to ramble on about the difference between hyphens, 'n' dashes and 'm' dashes, but it would not be relevant and I'd probably bore you to tears. The word can be spelled with or without a hyphen, and with or without those two little dots over the second 'o' (the name of which is 'umlaut'). It does not appear to be correct, however, to use both the hyphen as well as the umlaut. The prefix 'co' means together, so 'cooperate' means to operate together. Let's just say that the spelling of the word is still 'in transition.' (As my editorial comment, the spelling has been 'in transition' for an interminably long time, with no relief yet in sight.)
Interstate cooperation is the cooperation between two or more states. States use agreements to work together in areas including homeland security and economic development.
Areas of cooperation between the Europeans and native Americans
the constitution encourages cooperation between states by solving conflicts between the states
"it's time to use cooperation" said the hard worker
Check your keyboard it's between the number zero and the plus symbol at the top right of the regular 105+ US keyboard. This is a hyphen and not a dash. If you use the hyphen key, you must use it twice to make a dash, but this still is not a dash as there is a space between the two hyphens. There are two types of dashes. The en dash and the em dash. The en dash is bigger than a hyphen, but smaller than a em dash. The em dash is what most would want to use. The way to type is as follows: en dash - hold down the "alt" key and type 0150. em dash - hold down the "alt" key and type 0151 - Note the dash used in each of the instructions. The first is an en dash, and the second is an em dash. The character beneath them is a hyphen.
Cooperation with your fellow classmates will help you learn to get along. Cooperation is key. May I have some cooperation, please?
Cooperation is the agreement of more that one person. Example sentence using the word cooperation, Bill will need your cooperation in order to get this job done.
A dash is used to connect two phrases; a hyphen is used to connect two words. Here are some examples. I use a hyphen for the compound word anti-matter. I use a dash to create a break in the flow of my sentence -- if you know what I mean.
If you wish to express that something happens in January, February, March and April, you could use a dash to express this rather than writing out each month. It would look like this: January-April.
To indicate that traffic in that lane is flowing in the same direction as you are traveling.
bipartisanship
There is debate about the dash between the two words. Inside Self Storage, the largest publication in the industry, seems insistent on using the dash. However you'll notice the majority of self storage facilities and other websites (including selfstorage.com) do not use a dash. Since self storage is short for "self-service storage," it makes more sense to me without a dash.