Write the equation of the parabola whose focus is (4,0) and directrix at y = 2

Step-by-step explanation: We know that distance from a point on the parabola and  focus is equal to their distance from a the directrix. Let (x, y) be the point,

So,

. This is the required equation.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk