10 points
seven years from now the age (a) of jose will be
which expression matches this situation?
a) 7a
b) a - 7
c) a + 7
d) 7 - a

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

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?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6