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2. Buy one, get one free - Wikipedia

   en.wikipedia.org/wiki/Buy_one,_get_one_free

   Buy one, get one free. " Buy one, get one free " or " two for the price of one " is a common form of sales promotion. Economist Alex Tabarrok has argued that the success of this promotion lies in the fact that consumers value the first unit significantly more than the second one. So compared to a seemingly equivalent "Half price off" promotion ...

3. K-1 visa - Wikipedia

   en.wikipedia.org/wiki/K-1_visa

   K-1 visa. A K-1 visa is a visa issued to the fiancé or fiancée of a United States citizen to enter the United States. A K-1 visa requires a foreigner to marry his or her U.S. citizen petitioner within 90 days of entry, or depart the United States. Once the couple marries, the foreign citizen can adjust status to become a lawful permanent ...

4. Civil Rights Act of 1964 - Wikipedia

   en.wikipedia.org/wiki/Civil_Rights_Act_of_1964

   The Civil Rights Act of 1964 ( Pub. L. 88–352, 78 Stat. 241, enacted July 2, 1964) is a landmark civil rights and labor law in the United States that outlaws discrimination based on race, color, religion, sex, [a] and national origin. [4] It prohibits unequal application of voter registration requirements, racial segregation in schools and ...

5. Inflation reading and a Fed meeting: What to know this week - AOL

   www.aol.com/finance/inflation-reading-fed...

   Entering the meeting, Tesla shares are down nearly 30% this year. Weekly calendar Monday. Economic data: New York Fed one-year inflation expectations, May (3.26% previously) Earnings: No notable ...

6. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...

7. Dye-sensitized solar cell - Wikipedia

   en.wikipedia.org/wiki/Dye-sensitized_solar_cell

   Dye-sensitized solar cell. A selection of dye-sensitized solar cells. A dye-sensitized solar cell ( DSSC, DSC, DYSC [1] or Grätzel cell) is a low-cost solar cell belonging to the group of thin film solar cells. [2] It is based on a semiconductor formed between a photo-sensitized anode and an electrolyte, a photoelectrochemical system.