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The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x