What Is the Lifetime on the Main Sequence of a 2-Solar-Mass

Multiple Choice

What is the lifetime on the main sequence of a 2-solar-mass star compared to the approximately 10-billion-year life of our Sun Pick the best answer.

A) $1.8 × 10^{11}$ years
B) $1.8 × 10^{10}$ years
C) $1.8 × 10^8$ years
D) $1.8 × 10^6$ years
E) $1.8 × 10^3$ years