The discounted price of a book is 85% of the original price. this is a savings of $3. a sales tax of 8% will be added to the discounted price. how much sales tax will be added?

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

< 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⭐