$7.$ A small moon of a giant planet has an orbital period of $1\mathrm{.}31$ days and an orbital radius of $4\mathrm{.}46$ x $10^5$ km$.$ From these data, determine the mass of the planet. Kg

$6.$ A satellite moves in a circular orbit around Earth at a speed of $5325$ m$/$s

$($a$)$ Determine the satellite's altitude above the surface Of earth. m

$($b$)$ Determine the period of the satellite's orbit. h