Let R be the region in the first quadrant bounded above by the curve y = 2 - x^2and
bounded below by the line y = x.
Suppose the shell method is used to determine the volume of the solid generated by
revolving R about the y-axis. What is the radius of a cylindrical shell at a point x in
[0, 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

Find the domain and range of the following function f(x) = 51x - 21+ 4

If a line is defined by the equation y = 5x + 2, what is the slope?