G determine the intervals on which f is concave up

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(g) Determine the intervals on whichfis concave up and on whichfis concave down.
(h) Using the information in parts (a)-(g), sketch the curve offforx[-5,5]. Be sure to labelthe graph!
2. [5marks]A car dealership has 60 cars on a lot that holds, at most, 150 cars.Each car currently sells for $30000which will decrease by $150 for each additional car brought onto the car lot.Determine the additional number ofcarsxthat should be put on the lot in order to maximize the dealership’s revenue [Recall: Revenue is the product ofthe selling price and the quantity sold].
3. [6marks]A cylindrical can without a top is to be made from 27π cm2of sheet metal.Find the dimensions of thecan with the greatest volume.Letrrepresent the radius andhrepresent the height of the can.

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