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2. Barnes & Noble - Wikipedia

   en.wikipedia.org/wiki/Barnes_&_Noble

   The first device was announced in the United States on October 20, 2009, and was released November 30, 2009, for $259. [90] On June 21, 2010, Barnes & Noble reduced the Nook's price to $199, as well as launched a new Wi-Fi-only model, for $149, and released a Nook colored touch screen for $249.

3. A/B testing - Wikipedia

   en.wikipedia.org/wiki/A/B_testing

   The company then monitors which campaign has the higher success rate by analyzing the use of the promotional codes. The email using the code A1 has a 5% response rate (50 of the 1,000 people emailed used the code to buy a product), and the email using the code B1 has a 3% response rate (30 of the recipients used the code to buy a product). The ...

4. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.

5. Natural number - Wikipedia

   en.wikipedia.org/wiki/Natural_number

   Mathematicians have noted tendencies in which definition is used, such as algebra texts including 0, [22] [d] number theory and analysis texts excluding 0, [22] [29] [30] logic and set theory texts including 0, [31] [32] [33] dictionaries excluding 0, [22] [34] school books (through high-school level) excluding 0, and upper-division college ...

6. Cape May, New Jersey - Wikipedia

   en.wikipedia.org/wiki/Cape_May,_New_Jersey

   Cape May (sometimes Cape May City) is a city and seaside resort located at the southern tip of Cape May Peninsula in Cape May County in the U.S. state of New Jersey.Located on the Atlantic Ocean near the mouth of the Delaware Bay, it is one of the country's oldest vacation resort destinations. [19]

7. North America - Wikipedia

   en.wikipedia.org/wiki/North_America

   A map of North America's physical, political, and population characteristics as of 2018. North America is a continent [b] in the Northern and Western Hemispheres. [c] North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean.