3 1/8 - 7/12 estimate the difference by rounding each fraction or mixed number to the nearest half or whole.

2

Step-by-step explanation:

3-1=2...since the nearest whole number for the first is 3 and that of the next is 1 since it is more than a half

step-by-step explanation:

20% of 120 is 24. if you subtract 24 from 120 you get 96

< 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⭐