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Find the point of inflection of the graph of the function. (If an answer does not exist, enter DNE.) R(x) = x - 9x2+29x - 33 ( x x ) = ( Describe the concavity. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) concave upward concave downward Submit Answer 19 DETAILS LARCALC11 3.5.019.MI. Find the limit, if it exists. 5x + 4 x- 7x - 6 Submit Answer 20 DETAILS LARCALC11 3.5.023. Find the limit, if it exists. lim 7x x- -wx+8 Submit Answer 21 DETAILS LARCALC11 3.7.019. A farmer plans to enclose a rectangular pasture adjacent to a river (see figure). The pasture must contain 245,000 square meters in order to provide enough grass for the herd. No fencing is needed along the river. What dimensions will require the least amount of fencing? I'm 1m