What Is the Radius of a Red Giant Star That $\odot$

question 82

Multiple Choice

What is the radius of a red giant star that has a luminosity of 300 L _$\odot$ and a temperature of 4000 K? (Note that the temperature of the Sun is 5800 K.)

• A) 8 R _\(\odot\)
• B) 13 R _\(\odot\)
• C) 25 R _\(\odot\)
• D) 36 R _\(\odot\)
• E) 65 R _\(\odot\)

---

Definitions:

Solid foods

Foods that are not liquid or pureed, introduced to an infant’s diet typically around six months of age to complement breastmilk or formula.

Whole cow's milk

The complete, unaltered milk obtained from cows, rich in nutrients like fat, protein, vitamins, and minerals, generally consumed after infancy.

Months old

A measure of age, particularly used for infants and young children, indicating the number of months since birth.

Years old

is a measure of age expressed by the number of years passed since birth.