I need help with this i don't know what I'm supposed to do ???

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

An equation representing lyle’s hedge-trimming business is a = 12n - 300 where a is the amount of profit or loss in dollars and n is the number of hedges trimmed. how would the graph of lyle’s business change if the equation a = 10n - 300 represented his business? the graph would be flatter. the graph would be steeper. the graph would start closer to the origin. the graph would start lower on the y-axis.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much