Based on current estimates of the value of Hubble's constant, how old is the universe?
A)12 to 15 billion years old
B)more than 20 billion years old
C)15 to 20 billion years old
D)4 to 8 billion years old
E)8 to 12 billion years old

Question

Quizplus · Accepted Answer

Based on current estimates, the value of Hubble's constant is approximately 70 km/s/Mpc. Using this value and extrapolating the expansion of the universe backward in time, it is estimated that the universe is approximately 12 to 15 billion years old. Therefore, choice A is the best answer.

Based on Current Estimates of the Value of Hubble's Constant