What are the domain and range of the relation {(–9, 5), (1, 5), (6, 11), (7, –10)}? a. domain: {–10, 5, 11}; range: {–9, 1, 6, 7}; b. domain: {–9, 1, 6, 7}; range: {–10, 5, 11} c. domain: {1, 5, 6, 7, 11}; range: {–10, –9} d. domain: {–9, 1, 6, 7}; range: {–10, –9, 1, 5, 6, 7, 10, 11}

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?

X-10/4 when x = –18 a 7 b –2 c –7 d 2

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is