Answer:
Step-by-step explanation:
Given
Economic system Q is given by

also 
if 



substitute these values




differentiate w.r.t to L to get 



1 = 144
2 = 144
3 = 36
4 = 90
5 = 144
6 = 36
7 = 144
8 = 90
Answer:
3/4
Step-by-step explanation:
1/4 = 0.25 1/2 = 0.50
0.25 + 0.50 = 0.75
0.75= 3/4
76 -20 = 56 so then you do 56/8 which is 7
So 7 is the answer Hope this helps