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OpenStudy (shaleiah):
OpenStudy (shaleiah):
@Directrix
jhonyy9 (jhonyy9):
hi - do you like we calculi it together - ?
first how many will be area of this square ?
OpenStudy (shaleiah):
81
jhonyy9 (jhonyy9):
yes so and area of this cyrcle ?
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OpenStudy (shaleiah):
254.34
OpenStudy (shaleiah):
3.14*9^2
jhonyy9 (jhonyy9):
why 9^2 ? 9 is the side length and the diameter of circle not the radius
jhonyy9 (jhonyy9):
do you understand me ?
jhonyy9 (jhonyy9):
so the radius will be just the diameter halfed
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jhonyy9 (jhonyy9):
9/2 not equal 3
OpenStudy (shaleiah):
3.14*4.5^2=63.585
jhonyy9 (jhonyy9):
ok than you have got this i believe you
so this is area of circle but you need getting how many is the probability in percent that a randomly chosen point lies in the square but not in the circle - yes ? so you need getting area of square without area of circle - how many will be ?
jhonyy9 (jhonyy9):
just substract from area of square the area of circle
jhonyy9 (jhonyy9):
81-63,585= 17,415
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OpenStudy (shaleiah):
17.415/81*100=21.5
jhonyy9 (jhonyy9):
so now for you get the right answer you need calculi this resulted 17,415 how many percent mean of area of the square - yes ?
OpenStudy (shaleiah):
21.5%
jhonyy9 (jhonyy9):
so
81 ----- 100%
17,415 --- x%
---------------
x = 17,415*100/81 = ?%
jhonyy9 (jhonyy9):
yes so this is the right way to calculi and get the right answer sure
hope you understand it now clearly
yes ?
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