Ed is on a road trip. he has already traveled 242 miles and is driving at a rate of 63 miles per hour. which equation could be used to find how many hours, x, ed has left in his road trip if he is traveling 668 total miles?
a.
242x + 668 = 63

b.
242x + 63 = 668

c.
63x + 242 = 668

d.
63x + 668 = 242

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?

3.4a=57.8 what is the the value of a

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)