I really need HELP! My test ends in 10 minutes! Reagan rides on a playground roundabout with a radius of 2.5 feet. To the nearest foot, how far does Reagan travel over an angle of 4/3 radians? ft

A. 14

B. 12

C. 8

D. 10

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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?