The amount of light a star gives off is called . -apparent magnitude . -visibility . -absolute magnitude . -light sensitivity .

The amount of light that a star gives off is actually brightness. But given the choices, I think it is the measure of the light that is asked. The answer is Absolute magnitude. This is the measure of the magnitude of brightness. This is usually used in celestial objects. 

Time takes the player to read the entire CD is 94.9 minutes.

Explanation:

compact disc (CD) contains 783.216 megabytes of digital information.

Each byte consists of exactly 8 bits.

constant rate of 1.1 megabits per second

How many minutes does it take the player to read the entire CD?

1 Megabites = 1000000 bites

783.216 megabytes = 783216000 bites = 783216000 x 8 = 6265728000 bits

1.1 megabits/s = 1100000 bits/s

thus

t =  6265728000 bits/1100000 bits/s

 = 5696 s

 = 94.9 min