Someone help me with this aswell

jerry is right because s represents how many pairs of shoes are there but the question is to find how many shoes are there so

jerry multiplied the number of pairs(s) × 2

so he got 2s and hence jerry is right

The sample is 13414 years old.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant= 100

a - x = amount left after decay process=

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

b) for completion of 20% of reaction

The sample is 13414 years old.