Convert the following description to a proper scale ratio:

$3$3 cm represents an actual distance of $9$9 m.

$20$20 cm represents an actual distance of $16$16 km.

$8$8 mm represents an actual distance of $40$40 m.

Bianca is looking over a map of her local area and notices that the scale of the map is given as $1:100$1:100 in the map legend.

Apply direct and inverse relationships with linear proportions

Apply numeric reasoning in solving problems