Use the orbital velocity law mr=rãv2g to calculate the mass of the central black hole. give your answer in kilograms.

Sagittarius A* is a bright and very compact astronomical radio source at the ... The proper motion of Sgr A* is approximately −2.70 mas per year for the right ascension and −5.6 mas ...
Mass‎: ‎(4.31 ± 0.38) × 106M☉; (4.1 ± 0.6) × 106; (4.02 ± 0.16) × 106 M☉‎
Distance‎: ‎7,940 ± 420; 7,860±140±40 pc‎
Right ascension‎: ‎17h 45m 40.0409s‎
Declination‎: ‎−29° 0′ 28.118″‎

I love black holes

This is the answer on Photomath