Answer:
Without any background information on the text such as what the physical environment is and what the economic activities are. I can't really help you.
Answer:
F = 120 N
Step-by-step explanation:
Given that,
The mass of the object, m = 20 kg
Acceleration of the object, a = 6 m/s²
We need to find the force exerted on an object. The force exerted on an object is given by :

So, the required force exerted on the object is 120 N.
Answer:
B,D
Step-by-step explanation:
Just use PEMDAS, comment in more explanation is needed