Answer: The rock is 2000785 years old.
Explanation:
Expression for rate law for first order kinetics is given by:

where,
k = rate constant
t = age of sample
a = initial amount of the reactant = 800
x = amount of daughter isotope = 600
a - x = amount left after decay process = amount of parent isotope = (800-600) = 200
Half life is the amount of time taken by a radioactive material to decay to half of its original value.




The rock is 2000785 years old.
Answer:
Dance in Thailand, pronounced is the main dramatic art form of Thailand.
Explanation:
Thai dance, like many forms of traditional Asian dance, can be divided into two major categories that correspond roughly to the high art (classical dance) and low art (folk dance) distinction.
4 degrees
Explanation:
Relatively steeper than the shelf, the slope angles down to the ocean basin at an average of 4 degrees in some areas, the angle may be as much as 25 degrees.