Aperson swims to the other end of a 20m long pool back. what is their displacement?

The displacement is simply equivalent to the shortest distance that can be drawn from the initial point towards the final point. If the path of the swim that the person took is from the initial point, then go to the 20 m end, but then go back to the initial point so the displacement would be equal to 0 (zero) since the initial and final points are the same.

zero

i'm on my way to history not a mistory.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .