10. An airline estimates that the probability a randomly selected call to its reservation phone line results in a reservation being made is 0.31. Suppose that 4 calls are randomly selected. 1. What is the probability that all 4 of the calls result in a reservation?
2. What is the probability that at least one of the calls does not result in a reservation?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm

Point b lies between points a and c on . let x represent the length of segment ab in inches. use the segment to complete the statements. the value of x is . the length of in inches is . the length of in inches is .