How old is a bone in which the carbon-14 in it has undergone 3 half-lives? a) 11,400 years old eliminate b) 17,100 years old c) 34,200 years old d) 57,000 years old

The answer is B 17,100,

(1,250 is the third half life of carbon 14)

Explanation:

The carbon 14 remaining in 0 years is 10,000. The carbon 14 remaining after its first half life would be 5,000, which is 5,700 years after death, the second half live would be 2,500 which is 11,400 years after death, the third half life is 1,250 which is 17,100 years after death. (divide the full life 10,000 by two)

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water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.