Write an inequality for the following situation: I need at least 30 minutes to bake a cake. (Let t hours = the time needed.)

t > 0.5

Step-by-step explanation:

It is t > 0.5 because this specifies that the time needed to bake a cake is more than 0.5 hrs, or 30 minutes.

< 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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