The following gives the number of pints of type b blood used at woodlawn hospital in the past 6 weeks: week of pints used august 31 360 september 7 389 september 14 410 september 21 381 september 28 368 october 5 374 forecast the demand for the week of october 12 using a 3-week moving average. 374.33 use a 3-week weighted moving average, with weights of .1, .3, and .6, using .6 for the most recent week. forecast demand for the week of october 12. 372.90 compute the forecast for the week of october 12 using exponential smoothing with a forecast for august 31 of 360 and α = .2. 374.26

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60