-2. Evaluate the
After a dilation with a center of (0, 0), a point was mapped
student's answer
A. The student is correct.
B. The student incorrectly calculated the scale factor to be -2.
C. The student incorrectly divided by the scale factor instead
of multiply
D. The student incorrectly added the scale factor instead of multiplying by it.

3. find the radius of circle p.4. find y.

How many zeros does the function f(x)=4x3-x2+1 have

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