Hannah has information about an object in circular orbit around Earth.

mEarth = 6.0 × 1024 kg

G = 6.67 × 10–11 StartFraction m Superscript 3 Baseline over kilograms times s Superscript 2 Baseline EndFraction.

rearth=6.0 x 106 m

Using the information given what does Hannah need in order to calculate the tangential speed of the orbiting object ?

the mass of the orbiting object
the distance of the orbiting object to Earth
the orbital period of Earth
the radius of Earth