Half-life of a radioactive element is the time required for the element to reduce to half of its initial concentration. The rate of change of concentration is calculated by the formula A(t)=Ao(12)tγA(t)=Ao(12)tγw here γγ is the half-life of the material, AoAo is the initial concentration of the radioactive element in the given sample, A(t)A(t) is the concentration of the radioactive element in the sample after time tt. If Radium has a half-life of 1600 years and the initial concentration of Radium in a sample was 100%, then calculate the percentage of Radium in that sample after 2000 years.
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diagonals are equal then parellogram is either rectangle or square.
solve by congruent triangles.
thus angle is 90°
according to the question ,
the coordinate system is up by 5 units so,
means that the values at 0 will be to 5 , 1 to 6..
so the is
now the coordinate system is also in x direction by 3 units to left so,
so, the coordinates to represent any line, point, graph on the system was
after the respective the new coordinates that should be used are
(note that even if x is performed first then the y even then it will yield the same result)