The Age of the Milky Way Galaxy Has Been Estimated

question 64

Multiple Choice

The age of the Milky Way galaxy has been estimated to be at least 13 billion years.What is this estimate based on?

• A)observations of globular clusters
• B)observations of open clusters
• C)21-cm radiation from H I regions
• D)radiation produced at the centre of the galaxy

---

Definitions:

Average Fixed Cost

The constant expenses associated with manufacturing divided by the amount of product created.

Mixers

Devices used to blend or mix various ingredients together, common in food processing and preparation.

Average Total Cost

The total cost of production divided by the number of units produced, representing the cost per unit.

Mixers

Devices used to mix various ingredients together or electronic sound equipment used for blending different sounds and channels.