Jack needs to earn a b in his algebra class. his current test scores are 77,81,80 and 88. his final exam is worth 3 test scores. in order to earn a b jack's average must lie between 80 and 89 inclusive. what range of scores can jack receive on the final exam to earn a b in the course?

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?

How many roots does the graphed polynomial function have? 1-02

Which expression gives the distance between the two points 2 5 and 4 8