Mathematics

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News:
February 24, 2022 - Russian invasion of Ukraine. It's all sad. How many pro-Russian trolls and pro-Russian disinformation do we have everywhere. In 1994, Russia agreed with Ukraine in the Budapest Memorandum that Ukraine would give up nuclear weapons from Soviet times exchanged with guaranteed Russia and other countries its territorial integrity. We have the year 2022, and Putin started to restore the original Soviet Union, of which Ukraine was a part 30 years ago, by a bloody military invasion. Of course, if Ukraine keeps its nuclear weapons or is a member of NATO, Russia will not do it.

• The temperature 31
  The temperature last night was -11°C and at noon today it was 3°C. What as the difference between the temperatures?
• An isosceles
  An isosceles trapezoid has base angles of 50° each and its bases are 20 cm and 30 cm. Compute its area.
• Big tower
  From the tower, which is 15 m high, and 30 m from the river, the river's width appeared at an angle of 15°. How wide is the river in this place?
• The temperature 30
  The temperature in hubby's office is 16 degrees Celsius and the temperature outside his  office is negative 7 degrees Celsius. What is the difference in temperature in these two places?
• Settle 71634
  Katka owes Anka 2 euros, Anka owes Zuzka 1 euro. How many euros will they have more or less when they settle their debts?
• At 5:00
  At 5:00 A.M., the room temperature was 20°C. After six hours, the reading was 28°C. The temperature rose to how many degrees? What was average change of temperature per hour?
• Mr. Cruz
  Mr. Cruz borrowed 21,600 euros for 3 years at 16 2⁄3% compounded annually. While Mr. Santos borrowed the same Amount at Simple Interest for the same period and at the same rate of interest. Who Pays more and how much?

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