I'm in desperate need of help on these last questions. I have been having trouble with statistics and cannot figure out these last questions. Any help would be appreciated!

The probability that a student uses Smarthinking Online Tutoring on a regular basis is 0.34 . In a group of 21 students, what is the probability that exactly 6 of them use Smarthinking Online Tutoring on a regular basis? Write only a number as your answer. Round to 4 decimal places (for example 0.2416). Do not write as a percentage. You r Answer: : The probability that a randomly selected commuter listens to audiobooks during their commute is 0.42 . Suppose that a sample of 10 commuters is selected, what is the probability that at most 3 of them listen to audiobooks? Write only a number as your answer. Round to 2 decimal places (for example 0.24). Do not write as a percentage. Your Answer: : At a car rental agency, 0.30 of the cars are returned on time. A sample of 13 car rentals is studied. What is the probability that more than 3 of them are returned on time? Write only a number as your answer. Round to 2 decimal places (for example 0.24). Do not write as a percentage. Your Answer: In a certain class, 27% of the students are left-handed. Suppose that a random sample of 56 students is selected. Find the mean number of lel'chanded students in the class. Round your answer to the nearest integer. Your Answer: 2 [ndiyiduals who have a particular gene have a 0_4g probability of contracting a certain disease. Suppose that 686 ndiyiduals with the gene participate in a lifetime study. What is the standard deviation of the number of people who eventually contract the disease? Nrite only a number as your answer. Round to 2 decimal places (for example 1.56). You r Answer: : Find the area under the standard normal curve that lies between z = 2.32 and z = 1.98. Note: the graph may not be drawn to scale. Write only a number as your answer. Round to 4 decimal places (for example 0.6148). Do not write as a percentage. You r Answer: lI nd the area of the shaded region where a = 0.?8 and b = 1.872 Note: the graph may not be drawn to scale. a b Write only a number as your answer. Round to 4 decimal places (for example 0.6148). Do not write as a percentage. The average price of a plane ticket to New York is $481 with a standard deviation of $41. Assume these prices are normally distributed. What proportion of plane ticket prices are less than $497? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). [)0 not write as a percentage. Your Answer: The numbers of minutes that travellers arrives at the airport before their scheduled departure are approximately normally distributed with mean 80.5 and standard deviation 9.9. What proportion of travellers arrive at the airport more than 23.9 minutes before their departure? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Natural Gas bills in a certain city have mean $110.29. Assume the bills are normally distributed with standard deviation $12.22. Find the value that separates the lower 53% of the bills from the rest. Write only a number as your answer. Round to two decimal places (for example: 42.81). Do not write any units. You r Answer: A survey among freshmen at a certain university revealed that the number of hours spent studying the week before nal exams was normally distributed with mean 31 and standard deviation 4. Flnd percentile corresponding to p = 62% of the number of hours studying. Write only a number as your answer. Round to two decimal places (for example: 20.81). You r