If the Milky Way Formed Stars at Approximately a Constant

question 75

Multiple Choice

If the Milky Way formed stars at approximately a constant rate over the last 14 billion years, what fraction of the M-type stars that ever formed in it can still be found as main-sequence stars today? (Note that M-type stars have a mass of approximately 0.5 M_SUN.)

• A) 10 percent
• B) 33 percent
• C) 50 percent
• D) 75 percent
• E) 100 percent

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Definitions:

Net Cash Flow

The total amount of money being transferred in and out of a business, especially as it relates to operational, investing, and financing activities.

Subsidiary Acquired

A business entity whose control is obtained by another entity (parent company) through the acquisition of its majority voting stock.

Financing Cash Flows

Cash flows associated with the raising of capital and repayment of borrowings, including issuing and repurchasing shares, and payment of dividends.