Answer: Cholesterol helps your body build new cells, insulate nerves, and produce hormones.
Explanation:
Answer:
Crude oil is the main source
Explanation:
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Answer:
This exercise is incomplete, missing the value of k (decay constant), which is equal to 4x10⁻⁸s⁻¹ at 25°C
The answer is 0.549 years
Explanation:
Given:
first order of reaction
k = 4x10⁻⁸s⁻¹
For a first order of reaction, the half-life time for the degradation of DDT is equal to:

this is true. when it is warmer the plant and insects can migrate to these other places so they do not have to die or hibernate through winter