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  2. Where to find today's best sales: Enjoy $25 for an Amazon ...

    www.aol.com/lifestyle/where-to-find-todays-best...

    Well, here are 10 of the best we've found today, so you can save some serious cash. First up, the Amazon Echo Pop is only $25 and comes with a smart color bulb so you can say "Hey Alexa, turn off ...

  3. United States twenty-dollar bill - Wikipedia

    en.wikipedia.org/wiki/United_States_twenty...

    Reverse. Design. White House. Design date. 2003. The United States twenty-dollar bill (US$20) is a denomination of U.S. currency. A portrait of Andrew Jackson, the seventh U.S. president (1829–1837), has been featured on the obverse of the bill since 1928; the White House is featured on the reverse. As of December 2018, the average life of a ...

  4. Hydrochloric acid - Wikipedia

    en.wikipedia.org/wiki/Hydrochloric_acid

    [25] [7] Technical quality HCl at typically 18% concentration is the most commonly used pickling agent for the pickling of carbon steel grades. Fe 3 O 4 + Fe + 8 HCl → 4 FeCl 2 + 4 H 2 O The spent acid has long been reused as iron(II) chloride (also known as ferrous chloride) solutions, but high heavy-metal levels in the pickling liquor have ...

  5. Ceres (dwarf planet) - Wikipedia

    en.wikipedia.org/wiki/Ceres_(dwarf_planet)

    The range of the extent of differentiation is consistent with the data, from a large, 360 km (220 mi) core of 75% chondrules and 25% particulates and a mantle of 75% ice and 25% particulates, to a small, 85 km (55 mi) core consisting nearly entirely of particulates and a mantle of 30% ice and 70% particulates.

  6. Risk reversal - Wikipedia

    en.wikipedia.org/wiki/Risk_reversal

    In other words, for a given maturity, the 25 risk reversal is the vol of the 25 delta call less the vol of the 25 delta put. The 25 delta put is the put whose strike has been chosen such that the delta is -25%. The greater the demand for an options contract, the greater its price and hence the greater its implied volatility.

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