ASK YOUR TEACHER Pen bottom of the pencil holder is 40 cents per cm2 and the cost of producing the side of the cylinder is 27 cens per cmz. Hint: the area of the side is anh. (D (a) The cost function is Note: Enter the cost function in terms of the radius r only. The symbol It is in the Calcpad on the right in Symbols. (30') = (b) The dimensions of the pencil holder that has the minimum cost are Note: Enter your answers as fractions or decimal numbers rounded to 4 decimal places without units. r = in = in Submit