PLEASE HELP!!! this is actually english but--- what is a counterargument and rebuttal in a persuasive speech?

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)