If the Elliptical Galaxy in Hydra, Whose Image and Spectrum

Multiple Choice

If the elliptical galaxy in Hydra, whose image and spectrum are shown at the bottom of Figure 23-16 (Universe, 11th ed.) , were to be at a distance of 3 billion ly, what would be the value of the Hubble constant H₀? (Be careful with units.)

A) about 215 km/s/Mly
B) about 20 km/s/Mly
C) about 20,000 km/s/Mly
D) about 66 km/s/Mly