Lunch is being served to members of a club. Each member orders a sandwich by choosing one type of bread, one kind of meat, and one kind of cheese. BREAD: white or whole wheat
MEAT: ham or turkey
CHEESE: cheddar, swiss, or american

Which tree diagram shows the correct sample space for the event?

What is the solution of the systems of equations? y=2/3x+3 x=-2

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

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9