It has been found that the average number of daily phone calls c between two cities is directly proportional to the product of the populations p1 and p2 of the two cities and inversely proportional to the square of the distance d between the cities. that is, c=(kp1p2)/(d^2). the distance between albany, new york, and cleveland, ohio, is about 480 miles. if the average number of daily phone calls between the cities is 250,000, find the value of k and write the equation of variation. round to the nearest thousandth. the population of albany and cleveland is 95,000 and 2,900,000 respectively.