What does the equation for the relationship between intensity and distance tell us about the brightness of stars we observe in the night sky? Equation 3235x^-1.14

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.