Instructors at a sports club were surveyed about whether they are certified in CPR. The survey results are shown in the two-way frequency table.

Does the data show an association between the type of instructor and a certification in CPR?

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

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is