One fourth means (one half) of (one half) .
So the 18 months must be two half-lifes.
The half-life of this particular isotope is 9 months.
Answer:
dishes
Explanation:
they soak up water and soap to help clean dishes.
// have a great day //
Well living is having life while biotic is pertaining, or produced by life or living organisms. :)
Vasoconstriction
Definition-The blood vessels under your skin become narrower. This decreases blood flow to your skin, retaining heat near the warm inner body.
Answer:
A.the flow of energy between organisms in an ecosystem
