precalculus word problem

R

Renea

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Manufacturing. The AccuData Company makes compact disks measuring 12 centimeters in diameter. The diameters of the disks can vary no more than 50 micrometers or 5 X 10^-3 centimeter.

A. Write an absolute value inequality to represent the range of diameters of compact disk.

B. What are the largest and smallest diameters that are allowable?
 
You're going to have to take a shot at this one. Go ahead. Give it a try.
 
I don't know where to even begin, that is why I ask. Have no clue!!!!
 
I simply do not believe you have NO idea. It just can't be. Take a deep breath and give it another go.

It requires scaling of units, which is done for you. That's already a start.

It requires addition and subtraction.

If you are struggling with the Absolute Value, do part B first.

Again, let's see what you get.
 
First you should consider what the minimum and maximum values are. That means adding/subtracting the tolerances to/from the base diameter. I'm not sure why they would specify an absolute value inequality but what they're looking for is minSize<=d<=maxSize. Take another look at the problem and facepalm :wink:
 
R is the actual measurement of a given disk

|R - 12 centimeters| < 50 micrometers
 
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