How many computers must the ab computer company sell to break even? let x be the number of computers.
cost function: c (x) = 145 + 1/4x
revenue function: r (x) = 1.5x

You break even if you spend exactly as much as you gain. In other words, if the cost and the revenue are the same:

Subtract 0.25 from both sides:

Divide both sides by 1.25:

So, they must sell 116 computers to break even. If they sell less, they'll lose money. If they sell more, they'll start making profit.

< 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⭐