DIRECTIONS Alma has a number of yellow cubes one greater than 15. Juan has a number of green cubes one less than 17. Show the cubes.
Compare the sets of cubes. Draw the cubes. Tell a friend about your drawing.
Chapter 8 • Lesson 4
four hundred

Which of the following expressions are equivalent ?

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

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.