9^0 its that answer because all the other number you can make a whole number.
Answer:
you need to isolate t or time
you need to know distance between sun and earth and velocity of them in order to calculate how long it takes for light to travel from the Sun to Earth
Step-by-step explanation:

to find time you multiply t to both sides then you cancel t from where velocity is and you get velocity by itself
now you mulipy d to both side to get v over d and time by itself
12x40=480
You can first multiply 12x4=48 and then you could put a zero next to the 8
12/16,
6/8,
3/4, and
45/60
are all equivalent to 24/32.
Now that I've listed those four, there are
only an infinite number of others remaining.