A retailer has determined that the cost C of

ordering and storing x units of a product is

c=6x+900000/x

(a) Write the expression for cost as a single fraction.

(b) Determine the cost for ordering and storing - x=240

units of this product ...?

A. The expression given in the question is

c = 6x + (900000/x)

c = (6x^ + 900000) / x

I hope that this is the expression that you were looking for.

b. When x = 240, then

c = [6 * (240) ^2 + 900000] / 240

= (6 * 57600) + 900000/240

= (345600 + 900000) / 240

= 5190

From the above deduction, it can be concluded that the cost of ordering and storing is 5190. I hope the procedure is clear enough for you to understand.