Question 1089554
cost to inoculate is (130 * x) / (100 - x)


x is the percent of the population that is being inoculated.


the cost to inoculate 70% of the population would be (130 * 70) / (100 - 70) = (130 * 70) / 30.


this is equal to 303.333333 million dollars


the cost to inoculate 40% of the population would be (130 * 40) / (100 - 40) = (130 * 40) / 60


this is equal to 86.666667 million dollars


the difference is 303.333333 - 86.666667 = 216.66666 million dollars which you would round to 216.7 million dollars.