A radio telescope has a parabolic surface as shown below. If the telescope is 1 m deep and 20 m wide, how far is the focus from the vertex?

Which graph corresponds to the function f(x) = x2 + 4x – 1?

This is about circle theorems. someone asap : (

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?