Solution of task 13.5.4 from the collection of Kepe OE

If the total amount of your purchases from the seller Михаил_Перович more than:
- 17324 ₽ the discount is 15%
- 8662 ₽ the discount is 10%
- 4331 ₽ the discount is 7%
- 1732 ₽ the discount is 5%
- 866 ₽ the discount is 3%
- 433 ₽ the discount is 2%
- 87 ₽ the discount is 1%

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13.5.4
The weight is suspended to a spring with a stiffness coefficient c = 200 N / m and moves along a straight line according to the equation y = Ae-0.9t sin (5t + a). Determine the weight of the load. (Answer 7,75)