A science museum has a scale model of a ladybug. In the model, 50 centimeters represents 9 millimeters. The length of the model is 1 meter. How long is the actual ladybug?
50 cm represents 9 mm, so
100 cm = 18 mm, but
100 cm = 1 m, which is the lemgth of the model. So
Actual lenght of bug is 18 mm