Physics help? 10 points?

Question

If a galaxy 3 x 10^21 km away is receding from us at 1.5 x 10^11 km y^-1, calculate the age of the universe in years.

Answer 1

time

= distance/velocity

= (3 x 10^21km) / (1.5 x 10^11km/yr)

= 2 x 10^10 yr

= 20 billion yrs

,.,