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Question #19083

find 82.5% of 400

Expert's answer

82.5% of 400 is 400*0,825=330

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**1.**Give an example to show, that the sum of two semiprime ideals need not be semiprime.**2.**Show that, with respect to inclusion, the set S of semiprime ideals in any ring R forms a lattice ha**3.**Let A ideal in a semiprime ring R. Show that annr(A) = annl(A).**4.**Let A,B be left (resp. right) ideals in a semiprime ring R. Show that AB = 0 iff BA = 0.**5.**Show that a ring R is semiprime iff, for any two ideals A,B in R, AB = 0 implies that A ∩ B**6.**Let R be a subring of a right noetherian ring Q with a set S ⊆ R ∩ U(Q) such that e**7.**For R be a subring of a right noetherian ring Q=RS^-1 with a set S ⊆ R ∩ U(Q). Show

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