What is 10 divided by 2000 multipyed by 100

10 divided by 2000 equals 0.005, we then multiply 0.005 by 100 which knocks 2 place off which gives you 0.5.

< 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

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step-by-step explanation: