Answer:
-4
Step-by-step explanation:
Answer:
The value is 
Step-by-step explanation:
Generally the productivity rate is mathematically represented as

Here K is the ha the farmer could harvest in an hour and Z is a typical yield of corn in kg/ha
Now considering 1970
The productivity rate is

=>
Now considering 1940
The productivity rate is given as
Generally the productivity ratio is mathematically ration is mathematically represented as

=> 
=> 
Answer:
0
HOPE THIS HELPS
-Todo <3
Step-by-step explanation:
-4/5+4/5=0
Answer:
The way I would write it is: 700,000 + 20,000 + 4,000= 724,000