The distance between two directrices of a rectangular hyperbola is 10 units. Find the distance between its foci.

Find the distance between Venus and Sun.

The distance between the genes is measured by

The distance between the Earth and the Moon is

Find distance between X-axis and line y=-4.

The distance between the foci of a hyperbola is 16 and e = sqrt2 . Its equation is

The equation to the hyperbola having its eccentricity 2 and the distance between its foci is 8 is

find the equation of the hyperbola whose conjugate axis is 5 and the distance between the foci is 13.

The force between two charges at a perticular distance in air is 36 N. if the distance between the charges is filled by a medium of dielectric constant 6, then the force is ______

If the focal distance of the one end of the minor axis of standard ellipse is k and distance between its foci is 2h(kgth) , then find its equation.