ana, radu, si teo au impreuna 846 de mere. cate mere are fiecare copil daca radu are cu 4 mai multe decat ana si de doua ori mai multe decat teo. VA ROG COROANA DOAR AJUTOR ( PUN O MATERIE LA INTAMPLARE PT CA NUMI ARATA LB ROMANA DAR LA ASTA E) ​

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed