Question

The number of telephone calls N between two cities A and B varies directly as the population P$_{A}$, P$_B$ respectively and inversely as the square of the distance D between A and B. Which of the following equations represents this relation?

N = $\frac{kp_A}{D^2} + {cp_B}{D^2}$

N = $\frac{k P_{A} P_{B} }{D^2}$

N = $\frac{kD_AP_D}{B^2}$

N = $\frac{kD^2_AP_D}{B}$

Accepted Answer

N = $\frac{k P_{A} P_{B} }{D^2}$

Answer

N = $\frac{kp_A}{D^2} + {cp_B}{D^2}$

Answer

N = $\frac{kD_AP_D}{B^2}$

Answer

N = $\frac{kD^2_AP_D}{B}$

The number of telephone calls N between two cities A and B varies directly as the population P\(_{A}\), P\(_B\) respectively and inversely as the square of ...