58.. in a rock sample, the values of (87sr/86sr) present and (87rb/86sr) present are shown as slope in the diafram. the decay constant () of 87rb is 1725 my, ca

58.. In a rock sample, the values of (87Sr/86Sr) present and (87Rb/86Sr) present are shown as slope in the diafram. The decay constant () of 87Rb is 1725 MY, calculate the time period 0.78 1725 million years NTime since last melt determined from the slope of the isochron line. 0.76 0.74 Angle 50.25 0.72 0.70 2 8Rb8Sr le coiccaic