6. Records indicate that x years after the year 2000, the property tax on a four-bedroom...

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6. Records indicate that x years after the year 2000, the property tax on a four-bedroom home in a suburb of a major city was 7 (x) = 3x + 40x + 1800 dollars. [10 pts.] (a) At what rate was the property tax increasing with respect to time in 2008? (a) (b) What's the average rate of change of the property tax between 2005 and 2008? (b) 6. Records indicate that x years after the year 2000, the property tax on a four-bedroom home in a suburb of a major city was 7 (x) = 3x + 40x + 1800 dollars. [10 pts.] (a) At what rate was the property tax increasing with respect to time in 2008? (a) (b) What's the average rate of change of the property tax between 2005 and 2008? (b)