What is revision?

a. the step in the writing process where you look at your work critically, asking yourself questions such as, "will my goal be clear to readers? "
b. the step in the writing process when you determine your purpose and audience
c. the step in the writing process when you want to get the format set and put paragraphs in place, with less of a focus on avoiding errors
d. the step in the writing process when you look closely at language mechanics, word usage, and sentence structure

Customers arrive at rich dunn's styling shop at a rate of 3 per hour, distributed in a poisson fashion. rich can perform an average of 5 haircuts per hour, according to a negative exponential distribution. a) the average number of customers waiting for haircuts= customersb) the average number of customers in the shop= customersc) the average time a customer waits until it is his or her turn= minutesd) the average time a customer spends in the shop= minutese) the percentage of time that rich is busy= percent