<h3><u>Answer;</u></h3>
Potassium-40 has a half life of 1.25 billion years.
<h3><u>Explanation;</u></h3>
New amount = Original amount × (1/2)^n ; where n is the number of half lives.
Original amount is 50 atoms
New amount is 25 atoms
Therefore;
25 = 50 × (1/2)^n
1/2 = (1/2)^n
Thus; n = 1
n = 1 which is equivalent to 1.25 billion years
Therefore;
<u>Potassium-40 has a half life of 1.25 billion years.</u>
Answer: -70
Explanation:
Most cells have electrical potential difference between -40 and -70 millivolts.
When the strands separate, each strand serves as a template for the replication of other strand
C. There is a 75% chance the offspring will express the tall trait with a genotype of TT or Tt, while there is only a 25% chance the offspring will display the short phenotype, with a genotype of tt.
Answer: the answer is B which is stationary
Explanation:
This type of front behaves like a warm front only that it is quiescent because the front barely shifts its position. The weather may also be similar to that of a warm front. The two abutting air masses run almost parallel to the front because none is stronger than the other to cause displacement.