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elisichiBest ResponseYou've already chosen the best response.0
The answer for part B, the one I don't get is 3050, but I don't know how to get there.
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.0
dw:1355067118226:dw
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Who told you the answer for B is 3050? That's not what I came up with.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Even though that's a REALLY big number, I realize I forgot to calculate the internal diameter. Hold on.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Okay. I think I've got the answer. Can you tell me how you started this problem?
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
The textbook says that..
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Textbook's wrong. Over THREE THOUSAND washers can be carved from one square meter of metal?
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
Yes, so I did 3/0.0004= 7500 and thats the number of washers for question a
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
How did you get .0004?
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
Oh my gosh, never mind I get it!!
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
You know the formula for the area of a circle is (3.14 * r^2) ? That's why I have no idea where you got the .0004
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Here's what I did: I figured out the diameter of the entire washer. The washer's EXTERNAL DIAMETER is 2 cm. That means that the radius is 1 cm. And that means that the area is 3.14 cm squared, which is the same as .0314 meters squared.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
I found the AREA of the entire washer, sorry. That's .0314 meters squared.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
But the washer has a hole. So now we have to find the area of the hole. The DIAMETER of the hole (INTERNAL diameter) is 1 cm. That means that the AREA of the hole is.... (3.14 * .5 squared), which is .785 cm squared.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
If you subtract that from 3.14 cm squared, you get 2.36 cm squared, which is the same as .0236 meters squared.
 one year ago

InYourHeadBest ResponseYou've already chosen the best response.1
Can you tell me how you got .0004?
 one year ago
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