Use t = to compute the life expectancy of a 0.9-solar-mass star. (A solar lifetime is approximately 10 billion years.) M2.5 yr Why might this be an underestimate if the star is fully mixed by convection? O If the star is fully mixed its mass will be much smaller than 0.9 solar masses. O If the star is fully mixed it will be able to use a larger portion of its hydrogen in fusion than the Sun. O If the star is fully mixed it will be able to use a smaller portion of its hydrogen in fusion than the Sun. O If the star is fully mixed its mass will be much larger than 0.9 solar masses.

Use t = to compute the life expectancy of a 0.9-solar-mass star. (A solar lifetime is approximately 10 billion years.) M2.5 yr Why might this be an underestimate if the star is fully mixed by convection? O If the star is fully mixed its mass will be much smaller than 0.9 solar masses. O If the star is fully mixed it will be able to use a larger portion of its hydrogen in fusion than the Sun. O If the star is fully mixed it will be able to use a smaller portion of its hydrogen in fusion than the Sun. O If the star is fully mixed its mass will be much larger than 0.9 solar masses.