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Mathematics 15 Online
OpenStudy (anonymous):

Is my answer correct?

OpenStudy (anonymous):

A large emerald with a mass of 764.3 grams was recently discovered in a mine. If the density of the emerald is 2.76grams over centimeters cubed, what is the volume? Round to the nearest hundredth when necessary and only enter numerical values, which can include a decimal point. 276.92

OpenStudy (anonymous):

is that right?

OpenStudy (wolf1728):

Density = Mass / Volume Volume = Mass / Density Volume = 764.3 grams / 2.76 grams per cm³ Volume = 276.9202898551 cm³ Rounded = Volume = 276.92 cm³

OpenStudy (anonymous):

Thank you so sooooo much!!

OpenStudy (geekfromthefutur):

Wrong

OpenStudy (wolf1728):

geekfromthefutur - then what is the correct answer?

OpenStudy (geekfromthefutur):

I will tell u lol

OpenStudy (geekfromthefutur):

A large emerald with a mass of 378.24 grams was recently discovered in a mine. If the density of the emerald is 2.76grams over centimeters cubed, what is the volume? Round to the nearest hundredth when necessary and only enter numerical values, which can include a decimal point. Answer: 137.04 my teacher said it was correct

OpenStudy (geekfromthefutur):

@wolf1728

OpenStudy (wolf1728):

That's all well and good IF you are calculating the volume of a 378.24 gram emerald. However, the ORIGINAL question asked by Andraste states *************************************************** A large emerald with a mass of 764.3 grams ............ *************************************************** So, if you randomly change the question, you can make the answer anything. Also your answer of Answer: 137.04 my teacher said it was correct is NOT correct. Why ? You are NOT stating the units.

OpenStudy (geekfromthefutur):

Lol thats weird

OpenStudy (wolf1728):

Why did you change the original problem?

OpenStudy (geekfromthefutur):

I didnt know i did lol i thought it was the same i googles the question and this was one of the choices it gave me.

OpenStudy (wolf1728):

Well now you know why you got a different answer. By the way you know it is very important to state correct units too. RIght?

OpenStudy (wolf1728):

Okay I'll tell you. Let's suppose you want a guitar amp and you want to kw how powerful it is. You ask how powerful is it and they reply 100 - does that really help you?

OpenStudy (wolf1728):

Wow 100??? You'd better get out the ear protection for that monster amplifier.

OpenStudy (wolf1728):

Maybe he means it requires 100 volts OR maybe it will produce 100 decibels OR maybe it generates 100 watts OR maybe it requires 100 watts from the wall outlet, etc. You see, units ARE important.

OpenStudy (wolf1728):

I'm a guitar player and that's why I picked that example. Sometimes somebody might say they have a 500 watt amplifier - a VERY powerful amp. But I'd always be suspicious and say "Heck, if you put a toaster in the amp and measured the wattage USED by that amp you'd at least have a 1,000 watt amp." And I got my friends using the expression "That's a thousand watt amp??? Probably 'toaster watts' "

OpenStudy (wolf1728):

Well "geekfromthefutur" I'll get going but if nothing else I think you know the importance of units.

OpenStudy (geekfromthefutur):

lol yea later wolf

OpenStudy (wolf1728):

Okay see ya

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