unit 1 &2 methods help GUYS SAC IN 3 DAYS :(

[sally baker]

a piece of wire 100cm in length is to be cut into two pieces,one piece of which is to be shaped into a circle and the other a square.


a) how should the wire be cut if the sum of the enclosed areas is to be a minimum ?
b)how should the wire be used to obtain a maximum area?






question 2


 show an open cardboard box of dimensions x cm(width),x cm(length), y cm(height) and the lid  for the box of dimensions x cm , x cm and 2cm (height). The total amount of cardboard used for the box and the lid is 1400 cm ^2
Let V cm^3 be the volume of the box.


A) find y in terms of x
B)Find v in terms of x