Kevin bought 3 bags of gravel to cover the bottom of his fish tank. He has 8 pounds
of gravel left over. How much gravel did Kevin use
to cover the bottom of the tank?

< 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⭐

answer: im gonna go with milli

step-by-step explanation:

answer: 100

step-by-step explanation:

30,40,50 is correct answer