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  2. Chegg - Wikipedia

    en.wikipedia.org/wiki/Chegg

    Chegg, Inc., is an American education technology company based in Santa Clara, California. It provides homework help, digital and physical textbook rentals, ...

  3. International Fujita scale - Wikipedia

    en.wikipedia.org/wiki/International_Fujita_scale

    Most notably, the 2021 South Moravia tornado received a rating (IF4) and full damage survey on the IF-scale conducted by ESSL, the Czech Hydrometeorological Institute and four other organizations. [2] On May 6, 2023, version 0.99.9d was published, which changed it to a 9-step rating scale. [3]

  4. Chegg Tutors - Wikipedia

    en.wikipedia.org/wiki/Chegg_Tutors

    Chegg Tutors was founded in 2011 as InstaEDU and launched into public beta in May 2012. At that time, the company also announced that it had raised $1.1M in venture capital funding from The Social+Capital Partnership. [2] Two of the company's co-founders had previously run an in-home tutoring company called Cardinal Scholars.

  5. Starship flight test 4 - Wikipedia

    en.wikipedia.org/wiki/Starship_flight_test_4

    Starship flight test 4 was the fourth flight test of the SpaceX Starship launch vehicle. SpaceX performed the flight test on June 6, 2024. The prototype vehicles flown were the Starship Ship 29 upper-stage and Super Heavy Booster 11.

  6. If 4 - Wikipedia

    en.wikipedia.org/wiki/If_4

    If 4 is the fourth album released by the English jazz rock band If.It was first issued in 1972 and the last album to feature the original recording line-up. Capitol Records, the band's U.S. label, declined to issue this fourth album.

  7. Osman Rashid - Wikipedia

    en.wikipedia.org/wiki/Osman_Rashid

    Osman Rashid (born 1970) is a Pakistani American businessman in Silicon Valley, California. He has worked in enterprise software and consumer products. He was co-founder and CEO of three companies, an online textbook rental and student hub Chegg, remaining involved in it until early 2010 after growing the company from its inception in 2005. [1]

  8. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements.For example, in the conditional statement: "If P then Q", Q is necessary for P, because the truth of Q is guaranteed by the truth of P.

  9. Error function - Wikipedia

    en.wikipedia.org/wiki/Error_function

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