Which value of x is in the solution set of the following inequality?

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

How do the graphs of y = 1/x and y=5/x+6 compare?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)