The speed of a boat undergoing constant acceleration increases from 5 meters per second to 15 meters per second over a period of 20 seconds. how far does the boat travel during this time?

Will you chech and finish these for me, because i am stumped with them.

Part a constants huck finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion what is huck's velocity (speed and direction) relative to the river bank? express your answer to three significant figures and include the appropriate units. relative to the shore)

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?