Answer:
The answer is below
Explanation:
The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:

Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:

That is one-eight of Strontium 90 would be left after 87 years
Because things take time to grow
<span>The picture explains everything, but in more simpler terms. The plant uses sunlight and chemicals inside itself to create food. In this case it is glucose.</span>
Answer:
what are the choices for the adaptation
Provide structure and support, facilitate growth through mitosis. allow passive and active transport, produce energy, create metabolic reactions, aids in reproductive.