Find the equation of the tangent plane to the graph of 9y f(x, y) = at the point (4,-7). (Use symbolic notation and fractions where needed. Enter your answer using x-, y-, z-coordinates.) the equation:

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Q: A. The population is 900 in the beginning and grows by 350 people each year for 20 years.

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A: Since you have posted multiple questions, we will answer the first one for you, to get the remaining...