Step-by-step explanation:
19 : 40 :: x : 3.6
19 x 3.6 = 40x
68.4 = 40x
68. 4/40 = x
1.71= x
i think for the first question; an oligopoly
for the third i think its; d. people accept it in exchange for goods and services.
im not sure about the 2nd maybe b or d
Answer:
b= 29/11