Question 163919
picture johnstown as the center of a circle


smithville is on a circle with a 70 mi radius and tomstown is on a circle with a 90 mi radius


if they are on the same side of the circles (in the same direction from johnstown)
__ the closest they can be is 20 mi (90-70)


if they are on opposite sides of the circles (opposite directions from johnstown)
__ the farthest apart they can be is 160 mi (90+70)


there is only one answer between 20 and 160