40 POINTS Which three statements are true about the correlation shown by this scatter plot? Select all the correct answers. MORE THAN ONE The correlation coefficient is approximately 0.33.

The line of best fit cannot be used to make accurate predictions from the data.

The line of best fit can be used to make accurate predictions from the data.

The correlation coefficient indicates a strong positive correlation.

The correlation coefficient is approximately 0.96.

The correlation coefficient indicates a weak positive correlation.

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

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

What is the value of x when x + 7 = 21?