7. The table shows the percent of a sample of strontium-90 that remains every 5 years. 15 Year Percent Remaining 100.0 a) Using technology, determine the equation of the line or curve of best fit that best represents this data. Is it a strong correlation (R - value)? b) Use your equation to estimate how much Strontium-90 is left in year 40. 88.7 78.7 10 15 69.9 20 62.0 25 55.0 30 48.8

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