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brutusjohnson1
30.10.2020 •
Mathematics
after a heavy rain, a river reached the edge of its banks. any more rain and there would be a flood after a few hours, the river went down 1/5 inch. theb another rainstorm hit and dropped 1/4 inch of rain. the river rises by 1/20 of amount of rain that falls. usr this rxpression -1/5 + 1/4/20/1 to find how the new water level compares to the riverbank. did the new rain cause a flood?
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Ответ:
First you need to find the circumference of the circle because 1 revolution is 1 length of the circumference. The formula for the circumference is C=2πr or C=πd, if the diameter is 1 meter then the circumference is π1 which is just π, and if it travelled 8000 rotations then that would mean it travelled 8000π, so it travelled 8000π in meters