Miss anderson have a hundred and twenty eight pencils left over at the end of the school year she decides to keep half of them for the next school year and divided the rest of the pills evenly among her 16 student how many pencils with each student receive

128 divided by 2 which equals 64 then divide by 16 which you will get 4. So each student will receive 4 pencils.

< 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⭐