What is the length of the line?

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

If np3 /nc2 = 6, find the value of n

For every touchdown scored by the timberwolves the mascot does three backflips if the cheerleaders set off six confetti cannons how many touchdowns did the timberwolves score if the cheerleader set of 18 confetti cannons