T-shirts are on sale for $4 ofc the regular price. jeb buys 5 t-shirts for a total of $45.05, including a 6% sales tax. which equation can jeb use to find the regular price, r, of 1 t-shirt? a)0.06(5r-4)=45.05b)5(r-4)=1.06×(45 .05)c)1.06×5(r-4)=45.05d)5(r-4)+0.0 6r=45.05

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?