A plastic bullet is fired vertically upward from the top edge of a 20m high building. It just misses. the building on the way down and Stri kes the ground 10 seconds. later than it is fired. with what velocity was the bullet fired?

it takes about 30 days for it to break down

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 .

answer is slate

hope this