Answer: 693 years
Step-by-step explanation:
Expression for rate law for first order kinetics is given by:

k = rate constant
t = time taken for decomposition = 1
= Initial amount of the reactant
= amount of the reactant left =



for half life : 

Putting in the values , we get


Thus half life of this isotope, to the nearest year is 693.
If a circle has radius
R, its circumference equals to
2πR where π is an irrational number that, approximately, equals to
3.1415926
Answer:
Yes
Step-by-step explanation:
2
Simplify 2/3 - 1/7 to 11/21
10/21 + 11/21
Simplify
The answer is 1.