What is the acceleration of a car that slows down from 60 m/s to 40 m/s during a period of 10 seconds

Acceleration is the variation of Velocity in time :

  (1)

This can be written as:

  (2)

Where:

 is the final velocity

 is the initial velocity

 is the final time

 is the initial time

Finally:

The negative sign means the car is desaccelerating

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

there are no components of a physical goal mentioned on the list of choices that you've provided.