idith be\

A=(121)/(x)+2x^(2)

\ (a) Find

(121)/(dx)

the moenerrilis siek.\ \ The volume of chese in cach mozarella stick is

81cns

and hence the whal surface area is given by\

A=(321)/(x)+2x^(2)

\ (s) Find

(d.1)/(dx)

\ 13\ The surface area is to be minimized in osder to reduce the cooling rate of the moczarclla stick.\ (b) Using your answer to part (a), calculate the value of ix that minimizes the surfice aren of the mozzarella stick:

width x cm and beight xcm, as diown bolow. The volume of cherse in cach mozearella stick is 81cm and hence the wetal surface area is given by A=x321+2x2 (s) Find dxd.4 [3] The surface area is to be minimized in osder to reduce the cooling rate of the mozzarella stick. (b) Using your answer to part (a), calculate the value of or that minimizes the surfice area of the muzzarella stick. B