In a certain chemical, the ratio of zinc to copper is 3to 17. a jar of the chemical contains 748 gramsof copper. how many grams of zinc does it contain?

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

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?

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250