Answer:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
Explanation:
The amount of the sample of the radioactive isotope decays exponentially in time, the amount of mass of the sample as a function of time (
), in grams, is described below:
(1)
Where:
- Initial mass, in grams.
- Time, in years.
- Time constant, in years.
The time constant can be found from half life (
), in years, described in statement:
(2)
If we know that 
, 
and 
, then the current amount of the sample is:
The current amount of the Potassium-40 sample is approximately 37.521 grams.
The United States is an MDC.
Answer: 2) MDC or the second option.
Answer:
A. Locations closest to the equator
Explanation:
It is this because the equator gets the most sun exposure.
Answer: Panama
Explanation:
The Panama Canal (Spanish: Canal de Panamá) is an artificial 82 km (51 mi) waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean.
The correct answer is B. Medium. This is because to travel through the ear, the sound wave must go through the ear drum.
