A company wants to put its product in a can in the shape of a cylinder. It must have a volume of 100 π in3 . The siding/label cost 0.02 cents per square in, while the top and bottom cost 0.04 cents per square in. Find the dimensions that minimize cost.

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?