The price of coffee beans, b, fluctuates by 14% in both directions over a 4-month period. Which of the following expressions does not represent the possible cost of the coffee beans? a. b - 0.86b
b. 1.14b
c. 0.86b
d. b + 0.14b​

I don't know but I need points, look it up on go0gle

< 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⭐

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)