Guided Practice Simplify the expression. − 40 11 − 3

A.
− 40 8

B.
− 20 61 11 − 20 61 3

C.
− 5 11 −5 3

No. 4 , what’s a forty proportional?

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?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)