A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car's acceleration is meters/seconda

3 meter / second square.

Explanation:

The acceleration is defined as change in velocity over a period of time interval. Mathematically it can be written as,

acceleration = change in velocity / time

acceleration =  16- 4 (meters/second) / 4 seconds

acceleration = 12 meters/second / 4 seconds

acceleration =  3 meter / second square.

So the answer shows that the car accelerates 3 meter / second square.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this