a cylindrical container must have a volume of 300 in^3. the top and bottom parts of the cylinder cost $2 per square inch and the material used for the sides cost $6 per square inch. what are the dimensions (height and radius) that minimiize the cost of producing such a container

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Anyone know? is appreciated! will mark brainliest if correct!