Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1 2006-01-14 18:47:55

4littlepiggiesmom
Member
Registered: 2006-01-09
Posts: 42

### Mom Needs Help!!

A factory has fixed costs of 2,900 dollars, and each unit of their product costs 45 dollars to make. Using the letter 'x' for the number of units produced, find an expression for the average cost per unit if x units are produced.

What I think so far is that

45x(2900-x)...is that somewhat correct?

Offline

## #2 2006-01-14 19:42:18

ryos
Member
Registered: 2005-08-04
Posts: 394

### Re: Mom Needs Help!!

Not quite. Fixed costs are sunk, so they don't change no matter how much the company produces (or doesn't). So:

C = (2900 + 45x) / x

Is the average cost.

El que pega primero pega dos veces.

Offline

## #3 2006-01-14 22:42:07

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

### Re: Mom Needs Help!!

...Which can also be written as C = 45 + 2900/x

Why did the vector cross the road?
It wanted to be normal.

Offline