Answer: The age of the tool is 15539 years
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 15.5 % of original amount

Thus age of the tool is 15539 years
It a because the moons gravity pulls the water and the earths rotation moves the bump/wave
I can if you give man example I'll show you how to do it.
Answer:
The answer to this question has been described in details on the screenshots attached to this question.
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Answer: limiting reactant (or limiting reagent): The reactant that determines the amount of product that can be formed in a chemical reaction.
Explanation: Your welcome buddy.