The distance a spring stretches varies directly with the force applied to it. If a 7-pound weight stretches a spring a distance of 24.5 inches, how far will the spring stretch if a 12-pound weight is applied?

Answer 1

since d = kf, d/f = k and is constant. So, you want d such that

d/12 = 24.5/7

Answer 2

The national debt of a small country is 7,730,000,000 and the population is 2,484,000. What is the amount per person?