Denise built a storage shed. to cut the wood, she rented a large electric saw. the equation y = 15x + 12 represents the cost, y, to rent the saw for x days. explain what the slope and y-intercept of the equation represent in this situation.

a. it costs $12 to rent the saw plus $15 for each day you keep it

.b. it costs $15 to rent the saw plus $12 for each day you keep it.

c. it costs $15 to rent the saw, and denise kept the saw for 12 days.

d. it costs $12 to rent the saw, and denise kept the saw for 15 days

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?