1. About two-thirds of companies in America test newly-hired employees for
drugs, and 3.8% of those prospective employees test positive (based on data from
the American Management Association). The Sigma Electronics Company tests
150 prospective employees. If the 3.8% is assumed to be accurate, find the
probability that 20 or more (out of 300) will test positive. What is the chance that
less than ten will test positive ? Use the normal approximation to the binomial.

Evaluate cos2θ for cosθ = square root of 3/2

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?

What is the length and width of a 84.5 square foot rug? will mark