## Change: Economic Lot Size As Expressions Of Pj Problems - Peter O. Sagay

Company X produces item Y. Setting up each production run for Y costs $2500. Insurance costs, based on average number of Y in warehouse, is $20 per item per year. Storage costs, based on the maximum number of Y in the warehouse, is $15 per item per year. Suppose that company X expects to sell 1600 items of Y at a fairly uniform rate throughout the year. Determine the number of production runs that will minimize the company's total expenses.

## Change: Economic Order Quantity As Expressions Of Pj Problems - Peter O. Sagay

A store manager wants to establish an optimal inventory policy for an item. Sales are expected to be at a steady rate and should total *Q* items sold during the year. Each time an order is placed (order is assumed to be the same size), a cost of *h* dollars is incurred. Carrying cost for the year will be *s* dollars per item to be figured on the average number of items in storage during the year. Show that the total inventory cost is minimized when each order calls for *√(2Qh/s)* items.

## Motion: Continuity As Expressions Of Pj Problems - Peter O. Sagay.

The phenomenon of *continuity* is ubiquitous. It is in essence, *non-stop* repetitions towards an *end point*. For example, ...

## Motion: Sprints As Expressions Of Pj Problems - Iremisan Adegiga

Athletes are very displined. I have loved field & track events since my secondary school years . The above photo which is an example of the beauty of track events is why. There are six expressions of p_{j} problems in the photo. *Motion* and *force* are two of the six. Think about the other four.

## Change: Elasticity Of Demands As Expressions Of Pj Problems - Peter O. Sagay

Country X is a major supplier of commodity Y. X wishes to improve its balance of trade position by lowering the price of Y. The demand function is: *q = 1000/p ^{2}*.

(a) What is the Elasticity of Demand,

*E(p)*?

(b) Will country X succeed in raising its revenue?

## Change: Compound Interests As Expressions Of Pj Problems - Peter O. Sagay

Corporation X issues a *zero coupon bond* costing $200 and paying interest compounded monthly. After 5 years, the bond is worth $500. Agree or disagree with some financial experts who consider this bond to be a *junk bond*.

## Change: Estimations As Expressions Of Pj Problems - Peter O. Sagay

Early in elementary education, pupils are introduced to the concept of *rounding* numbers. For example, the number 57 *rounded* to the nearest *tenth* is 60. There are various reasons for approximating numbers: simplicity (e.g. 57 is simpler than 57.775) and elusiveness of the exact number (e.g. *π* = 3.1428...) are two common reasons. No matter the reason, the basic underlying concept of estimation is *change*: *data points* are replaced by other *data points*. Let us use the estimation method called the *method of least squares* to further explain *estimation*.