In a perfectly competitive market, a firms marginal revenue is typically with each additional item sold, and a monopoly's marginal revenue as the quantity of sales increases. Increasing; increasing
decreasing; increasing
increasing; constant
constant; decreasing

b

step-by-step explanation:

5y

step-by-step explanation:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

-2/