Question: a) Calculate the first and second differences, and the ratios in the table below. Calculate on a rough paper and write the final values only.

a) Calculate the first and second differences, and the ratios in the table below. Calculate on a rough paper and write the final values only. (3 points) Year Percent 1st 2nd Remaining Difference Difference Ratios 0 100 CT 88.7 10 78.7 15 69.9 20 62.0 25 55.0 30 48.8 b) Which model appears most suitable for the data: linear, quadratic, or exponential? Write your reason O 17'C RainSection C: Graphical Models TEST d) Use part b) and c) and generate the most suitable model for the data using a regression formula. Write the equation of the most suitable model below (3 points) . e) Use the equation from part d) to predict the percent remaining after 40 years. (2 points)f) Is the rate of change of amount of Strontium-90 with respect to time increasing, constant, or decreasing? Support your answer. (1 point) Submit O

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