The scale of a model train is 1 inch to 13.5 ft . one of the model trains is 5 inches long what is the length in feet of the actual train car

 1 in: 13.5 ft

 x5       x5

5 in : 67.5 ft

67.5 ft

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

answer is because 4×10=40

and 98×4= is 392

40,392