The percent of pi is 78.8%
Wiki User
∙ 14y agoRadius 10, area = 100 pi; radius 9, area = 81 pi
pi X radius squared X the percent of the circle.
No. But it's very convenient, and so close to 'pi' that it's often perfectly good enough for the purpose. In fact, it's amazing how close (22/7) really is ... it's larger than 'pi' by only about 0.04 percent !
((x*1.2)^2*pi-x^2*pi)/(x^2*pi)=0.44where X is the old radius((the new area - the old area) divided with the old area)The area increases with 44%
D=diameter... P=Pi(3.14159265)pi x D==================Divide the circumference by 'pi' to get the diameter.'Pi' is a number that can never be written exactly ... which is why a symbol is used instead. Its value is known to several thousand decimal places, which is more than anybody will ever need for any practical purpose.If you use [22/7] for 'pi', your answer is correct within 0.04 percent, which is pretty good.If you want the answer correct within one part in a million, use [3.14159] for 'pi'.
Assuming that this is 95 percent of a revolution, you can convert the percent to degrees by turning the percent into a decimal (.95) and multiplying that by the number of degrees in a circle (360) Degrees = 360 *.95 = 342 degrees Radians = Degrees * pi/180 Radians = 342 * pi/180 342 / 180 = 1.9 Radians = 1.9pi
Roughly 0.0000000462 percent, assuming that the sun radiates isotropically.Calculated as(pi) x (4000)2 / (4 pi) x (93,000,000)2
Multiply it by 4/3 pi r squared
pi X radius squared X the percent of the circle.
Radius 10, area = 100 pi; radius 9, area = 81 pi
If you mean percent error of 3.14 versus pi, which is 3.14159..., the error is only 0.05%
%g is more compact. Do some tests, for example:double pi= 3.1415926535897932384626433;printf ("%%f gives %f %f %f %f %f\n", pi, 100*pi, 10000*pi, 1000000*pi, 100000000*pi);printf ("%%e gives %e %e %e %e %e\n", pi, 100*pi, 10000*pi, 1000000*pi, 100000000*pi);printf ("%%g gives %g %g %g %g %g\n", pi, 100*pi, 10000*pi, 1000000*pi, 100000000*pi);%f gives 3.141593 314.159265 31415.926536 3141592.653590 314159265.358979%e gives 3.141593e+00 3.141593e+02 3.141593e+04 3.141593e+06 3.141593e+08%g gives 3.14159 314.159 31415.9 3.14159e+06 3.14159e+08
No. But it's very convenient, and so close to 'pi' that it's often perfectly good enough for the purpose. In fact, it's amazing how close (22/7) really is ... it's larger than 'pi' by only about 0.04 percent !
((x*1.2)^2*pi-x^2*pi)/(x^2*pi)=0.44where X is the old radius((the new area - the old area) divided with the old area)The area increases with 44%
Percentage error = 100*error/standard = 100*(3.98-3.14)/3.14 = 100*0.84/3.14 = 84/3.14 = 26.75%
The MIRR of this project is 13.89% and the PI is 1.13.
D=diameter... P=Pi(3.14159265)pi x D==================Divide the circumference by 'pi' to get the diameter.'Pi' is a number that can never be written exactly ... which is why a symbol is used instead. Its value is known to several thousand decimal places, which is more than anybody will ever need for any practical purpose.If you use [22/7] for 'pi', your answer is correct within 0.04 percent, which is pretty good.If you want the answer correct within one part in a million, use [3.14159] for 'pi'.