Answer:
120
Step-by-step explanation:
5x6 = 30
30x4= 120
Step-by-step explanation:
y is 130° too because it's an alternative angle love
X = 10 1n (15)
In decimal form it's 27.0805201
The amount of substance left of a radioactive element of half life,
after a time, t, is given by:
Given that <span>potassium-40 has a half life of approximately 1.25 billion
years.
The number of years it will take for 0.1% of potassium-40 to remain is obtained as follows:
Therefore, </span><span>the maximum age of a fossil that we could date using 40k is
12.5 billion years.</span>