This figure is made from a part of a square and a part of a circle. For each of the questions below, use 3.14 as an approximation for (pi) and round your solution to the nearest whole number.

a. What is the perimeter of this figure, to the nearest unit?

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b. What is the area of this figure, to the nearest square unit?

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Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

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