A whisper room is a room that allows two people to stand on opposite sides of an elliptically shaped room and hear each other’s
whispers. The locations at which they can hear one another are the foci of the ellipse. If the room has a major axis of 82 feet and a minor axis of 18 feet, how far apart, in feet are the two people? Do not include a label in your answer.
1 answer:
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Answer:
The graph is possible for
Step-by-step explanation:
we know that
The discriminant of a quadratic equation of the form
is equal to
If D=0 the quadratic equation has only one real solution
If D>0 the quadratic equation has two real solutions
If D<0 the quadratic equation has no real solution (complex solutions)
In this problem , looking at the graph, the quadratic equation has two real solutions (the solutions are the x-intercepts)
so
therefore
The graph is possible for