Amanda and jessica bought vegetables for their newly opened restaurant. amanda bought potatoes and onions. for every 18 pounds of potatoes that amanda bought, she bought 4.5 pounds of onions. jessica bought broccoli and onions. for every 18 pounds of broccoli that jessica bought, she bought 4 pounds of onions. if amanda bought 60 pounds of potatoes last week, and amanda and jessica bought the same amount of onions, then how many pounds of broccoli did jessica buy last week?

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