In which situation is the acceleration of the car negative?
a.)the velocity of a car was 75 km/h
b.)the velocity of a car reduced from 50 km/h over one minute
c.)the velocity of a car increased from 40 km/h to 75km/h over 15 minutes
d.)the velocity of a car increased from 40 km/sh at 2: 00pm and at 4: 00pm the velocity of the car was 85 km/h

B) The velocity of the car reduced from 50k/m over one min.

Answer is: B.)The velocity of a car reduced from 50 km/h over one minute.

Ending velocity is defined as the velocity attained by a body after completing distance at certain time interval:

v(ending velocity) = v(initial velocity) + a·t.

a is acceleration attained by the body (in this examle car).

t is time (in this example one minute).

Because velocity is reduced, acceleration has negative sign.

An car average acceleration over a period of time is its change in velocity.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them