Based on the half-life of 87Rb, record the time (in billions of years) and the percentage of parent isotopes remaining after 4 half-lives. I need to be able to graph the data for the predicted time (x-axis) versus the percent of parent isotope remaining (y-axis). thanks in advance

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.