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elisichi
 3 years ago
Math question! Help please! Semester test tomorrowww!!
elisichi
 3 years ago
Math question! Help please! Semester test tomorrowww!!

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

mathstudent55
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1355067118226:dw

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

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

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1Okay. I think I've got the answer. Can you tell me how you started this problem?

elisichi
 3 years ago
Best ResponseYou've already chosen the best response.0The textbook says that..

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

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

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1How did you get .0004?

elisichi
 3 years ago
Best ResponseYou've already chosen the best response.0Oh my gosh, never mind I get it!!

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1You 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

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1Here'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.

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1I found the AREA of the entire washer, sorry. That's .0314 meters squared.

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1But 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.

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

InYourHead
 3 years ago
Best ResponseYou've already chosen the best response.1Can you tell me how you got .0004?
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