The age of the given rock is 700 million years.
The given parameters;
- original mass of the rock, = 20 g
- mass of the rock remaining after decay, = 10 g
- half life of Uranium, [tex]t_{1/2}[/tex] = 700 years
age of the rock ----------------------------- mass remaining
0 [tex](t_0)[/tex] ------------------------------------------- 20 g
1 half life ([tex]1 \ t_{1/2}[/tex] ) ------------------------------ 10 g
Age of the rock [tex]= t_{1/2} - t_0 = 700 \ - 0 = 700 \ million \ years[/tex]
Thus, the age of the given rock is 700 million years.
Learn more here:https://brainly.com/question/23774743
