Answer: 
According to Newton's 2nd Law of Motion (in the specific case when the mass
<u>is constant</u>) the acceleration
that a body acquires is directly proportional to the exerted force
on the body.
As shown in the following equation:
(1)
We already know the value of the mass of the car and the force excerted on it. So, we need to find the value of the acceleration from equation (1):
(2)
And substitute the known values:
At this point, note that 
Taking this into account, the acceleration of the car is:

The salinity will sometimes be higher and sometimes be lower than in ocean water far from the river's mouth.
Is your answer
Mark Brainiest
The answer is 4 is helps you estimate the distance between two places.