FINANCE

Luke could invest $1000 at simple interest rate of 11% p. a. for 4 years or at 10% p. a. compound interest for the same period of time. Which is the better investment and by how much?

Pls show full working out ty ;)

Which is the completely factored from of xy^3-x^3y

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

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?