Can anyone give me the formula or equation so I can solve each of these? 1. The problem statement, all variables and given/known data Question #1 Suppose the Sun is located 7.4 kiloparsecs from the center of the Milky Way galaxy, and that it orbits the galaxy at a velocity of 240 km/sec. Estimate the mass of the galaxy interior to the Sun's orbit, converted to solar masses. ____solarmasses Question #2 A new distant galaxy is discovered which shows a redshift corresponding to a recession velocity of 4429.0 kilometers/second. Using Hubble's Law, and a value of H = 72 km/s per Mpc, what is the distance to the new galaxy in megaparsecs? ____Mpc Question #3 Find the invariant spacetime interval for a particle that travels sideways (in the x-direction only) a distance of 1000 kilometers in 0.1 seconds. ____meters Question #4 What is the Schwartzschild radius of a typical stellar remnant black hole with a mass of 18.57 solar masses? ____meters Question #5 What is the time required for a black hole with a mass of 5.13 x 1029 kilograms to evaporate by Hawking Radiation? ____years Question #6 What is the temperature of a typical stellar remnant black hole with a mass of 16.32 solar masses? ____Kelvins 2. Relevant equations I dont know the formula to solve them. 3. The attempt at a solution I cant do any attempts yet because I dont have the formulas.