It Can Be Shown That the Approximate Age of the Universe

Multiple Choice

It can be shown that the approximate age of the universe is 1/H, where H is the Hubble constant. Taking H = 20 km/s/Mly, estimate the age of the universe, in years.

A) 1500 years
B) 15 thousand years
C) 15 million years
D) 15 billion years
E) 15 trillion years