Determine whether each polynomial is irreducible over the integers

1 km = 1000 m. 1 m = 100 cm. 1 ft = 30.48 centimeters. Which means that 1 km = 1000 * 100 / 30.48 ft or 3280.8 ft. When solving such problems, simply convert the given measure unit into the measure unit type which makes up the one you are asked about (in this case ft).