The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution with the average amount of time equal to eight minutes. find the distribution that they spend 4 to 11 minutes in shopping the card

What is the ratio of the length of an object in yards to the length of the same object in miles?

Use sigma notation to represent the following series for 9 terms.

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.