Barbara graphs a family of equations of the form y = ax? How does each
new graph compare to the previous graph as Barbara increases the
value of a from to 1 to 1 to 2?

(A)Each new graph is above the previous graph.

(B)Each new graph is wider than the previous graph.

(C)Each new graph is narrower than the previous graph.

(D)Each new graph is to the right of the previous graph.

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

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?