Question

Suppose that it takes about 3 days for a space vehicle to travel from Earth to the moon. About how long would it take the same space vehicle traveling at the same speed to reach Pluto?

Answer 1

look up the distance to the moon.
Divide that by 3 to get the rate per day of the space vehicle

look up the distance to Pluto

divide that distance by the rate you found above to get the time.