sebuah kuboid bertapak segiempat sama dengan panjang sisi
x m dan tinggi t m mempunyai isi padu 27 m. cari nilai x
dan nilai t supaya jumlah luas permukaan kuboid itu adalah
minimum.

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons