The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 38.1 seconds and a standard deviation of 7.6 seconds.
a) What is the probability that a randomly chosen student completes the activity in less than 33.9 seconds?
b) What is the probability that a randomly chosen student completes the activity in more than 47.1 seconds?
c) What proportion of students take between 33.8 and 42.9 seconds to complete the activity?
seconds.
d) 70% of all students finish the activity in less than

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

According to the data set, where should the upper quartile line of the box plot be placed?

In new york city at the spring equinox there are 12 hours 8 minutes of daylight. the longest and shortest days of the year very by two hours and 53 minutes from the equinox in this year the equinox falls on march 21 in this task you use trigonometric function to model the hours of daylight hours on certain days of the year in new york city a.what is the independent and dependent variables? b.find the amplitude and the period of the function. c.create a trigonometric function that describes the hours of sunlight for each day of the year. d. graph the function you build in part c. e. use the function you build in part c to find out how many fewer daylight hours february 10 will have than march 21. you may look at the calendar.