The radioisotope Iodine-123 is used in thyroid therapy. The half-life of this isotope is 13.27 hours. Which equation determines the percent of an initial amount of the isotope remaining after t hours?

< 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⭐

range is infinite on both x and y axis positive and negative

step-by-step explanation:

can you put the picture up?

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