If dan was 4 years old 18 years ago, how old will he be 16 years from now?

4+18 = 22 thats now in 16  years would be 38 years old

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 diameter is 16 cm. are you a teacher?

step-by-step explanation: