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, 21.06.2022 07:40

# 9. a) The time taken for a standard flight from Sydney to Brisbane is normally distributed with a mean of 75 minutes and a standard deviation of 7 minutes. What is the probability of a flight taking longer than 80 minutes? b) If there are 500 flights from Sydney to Brisbane each week, how many of these will take more than 80 minutes?  ### Other questions on the subject: Mathematics

M
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M
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M
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What system of inequalities would you use to solve the problem below?Suppose you have a job teaching swimming lessons and get paid \$8 an hour. You also have a job as a cashier and get paid \$10 an hour. If you cannot work more than 22 hours a week, what are the number of hours you can work at each job and still make at least \$190?
M
Mathematics, 18.06.2021 18:52
Which statement matches the graph that is shown below? On a coordinate plane, a line goes through points (0, 4) and (8, 0). The y-intercept is 4. The x-intercept is 0. A savings account started with \$8 in it. 