At a fabric store, they can cut a length of fabric off a big roll, so you can buy any length you like. the cost for 3 feet of silk fabric is $9.75. how much would you pay for 20 feet of silk fabric, at this rate?

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