According to an almanac, 60% of adult smokers started smoking before turning 18 years old.

a) compute the mean and standard deviation of the random variable x, the number of smokers who started before 18 in 100 trials of the probability experiment.

b) interpret the mean.

c)would it be unusual to observe 80 smokers who started smoking before turning 18 years old in a random sample of 100 adult smokers? why?

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?

The slope of the line whose equation is 2x - 1 = 0 is