What is the lowest term for 1/5

What is the smallest integer n such that n\sqrt{2} is greater than 20

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

A0.40 kg soccer ball is kicked so that its incoming velocity of 5 m/s is changed to an outgoing velocity of -25 m/s. what impulse does the player apply to the ball?