B
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I plan on having a friendship that will last forever! how about you?
Answer:
It should be C.)
Explanation:
The elevations in the ground would show valleys.Valleys are like hills with different elevations.
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Answer:
The Metropolitian Museum of art.
Explanation:
It is located in New York and has a display of abstract art.
Answer: 256g oh phosphorus 30
Explanation: since the half life is 2.4 min, that mean the mass of phosphorus 30 reduced by half every 2.5 min from a certain amount. That is,
T1/2 = 2.5 min
Amount of time the phosphorus disintegrated into two is nT1/2,
30/2.5 = 6 half lives
Amount left after 6 half lives n = 4g
Inittial amount started with = N =?
Using N = n x 2^nT1/2
N = 4 x 2^6 = 4 x 64
N = 256g