Sergey is mixing cement, sand, and stone to make concrete. In order to make 8 buckets of concrete, he must use 3 1 4 buckets of sand. If he has plenty of cement and stone, how many buckets of concrete can Sergey make with 9 3 4 buckets of sand?

So first you beg your mom to seduce your teacher then all you needa do is sit back in that class

7

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⭐