An archaeologist in Turkey discovers a spear head that contains 80% of its original amount of c-14. find the age of the spear to the nearest year PLEASE HELP

answer: two five pound bags one two pound

step-by-step explanation:

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3