Potassium-40 has a half life of 1.251×billion<span> years</span><span>. To determine the percentage potassium-40 remaining after 3.9 billion years, divide
3.9 by 1.251, = 3.12.
This is the number of times the original amount of potassium-40 reduces by 50%. The remaining percentage is therefore 100%/(3.12 * 2) = 16.03%.</span>
Answer:
they have certain functions and or adaptations that allow them to move without spines
Explanation:
Answer:
It will eventually become unsustainable because of factors like food, water, space, etc.
Answer:
No, this would not be a symbiotic relationship.
Explanation:
Symbiotic relationship is between plants and fungi.
Answer:
The organisms at the base of the food chain are photosynthetic.
Explanation:
