# Math Help - Calculus: related rates

1. ## Calculus: related rates

Any body know how to start this problem?

At the Skywalker moisture farm on the desert planet Tatooine, there are 24 moisture
processors, with an average yield per processor of 300 cubits of moisture. Research conducted
at Mos Eisley University concludes that when an additional processor is used, the average
yield per processor is reduced by 5 cubits. Help Owen and Beru Skywalker ﬁnd the number of
moisture processors that will maximize the number of cubits.

2. ## Re: Calculus: related rates

You are trying to maximize $\text{(number of processors)}\times\text{(cubits per processor)}$
After installing x new processors what happens to $\text{(number of processors)}\times\text{(cubits per processor)}$

3. ## Re: Calculus: related rates

I have these two formulas...
Cubits=300-5(number of new processors)
Number of processors=24+(number of new processors)

does anyone know what to do next?

4. ## Re: Calculus: related rates

Originally Posted by brooke64
I have these two formulas...
Be a bit more careful about assigning meaning to these values.

Cubits=300-5(number of new processors)
Number of cubit per processor= 300- 5(number of new processors)

Number of processors=24+(number of new processors)

does anyone know what to do next?
Number of cubits= number of cubits per processor times Number of processors.