Mathematics, 31.03.2021 01:50 bando187

9. The average number of phone calls per day between two cities has found to be jointly proportional to the populations of the cities, and inversely proportional to the square of the distance between the two cities. The population of Charlotte is about 1,500,000 and the population of Nashville is about 1,200,000, 400miles. cities is about 200,000. (a) Find the k and write the equation of variation.
(b) The average number of daily phone calls between Charlotte and Indianapolis (which has a
populationofabout1,700,000)isabout1 34,000. . I

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9. The average number of phone calls per day between two cities has found to be jointly proportional...