Julie made 25 international long-distance phone calls to London last month. The scatterplot below shows the length and cost of each phone call she made. Cost of International Long-Distance Phone Calls Cost of Cal Molars) EN Length or call (minutes) Which conclusion is best supported by the scatterplot? A As the length of a call increases, the cost of the call increases. B As the length of a call increases, the cost of the call remains the same. C As the length of a call increases, the cost of the call decreases. There is no relationship between the cost of the call. ROC

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

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?

Which of the following is the maximum value of the equation y=-x^2+2x+5 a. 5 b. 6 c. 2. d. 1