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06.05.2020 •
Mathematics
A rectangular area adjacent to a river is fenced in; no fence is needed on the river side. The enclosed area is 2000 square feet. Fencing for the side parallel to the river is $ 7 per foot, and fencing for the other two sides is $ 4per foot. The four corner posts are $30 each. Let x be the length of one of the sides perpendicular to the river.The length of the side perpendicular to the river is how many feet?
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Ответ:
if there is 4 digits and 9 numbers each there is a possibility of 9 to the power of 4 different combinations.