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.
The united states’ geography would influence their foreign policy until this time
<h3>
What is foreign policy?</h3>
- Geography has been more of an ally than an enemy since the beginning of the nation. An island cannot control an entire continent, as the British discovered.
- America was undoubtedly exposed in those foreign policy. With their imperial aspirations, the French and Spanish posed a threat to North America.
- The British also weren't willing to give up easy; in 1812, the king's troops invaded and set fire to areas of Washington, and they did so again during the American Civil War.
- Nevertheless, for the majority of its history, the United States had a foreign policy unmatched by other nations.
To learn more about foreign policy with the given link
brainly.com/question/27950081
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Answer:
Creation of walkable neighborhoods with mixed-use land and access to public transportation
Explanation:
The goal of smart-growth planning is to produce a pattern of compact and contiguous development to limit urban sprawl. Walkable neighborhoods with mixed-use land and access to public transportation are part of the design goals.
