The cities D, E, and F, in respective order, lie approximately in a straight line. The distance from city D to city E is 130 miles. The distance from city D to city F is 140 miles. Find the distance from city E to city F.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.