Homework Help: math

Posted by kirk on Wednesday, March 17, 2010 at 10:14am.

The amount of gold jewelry and other products is measured
in karats (K), where 24K represents pure gold. The mark 14K
on a chain indicates that the ratio between the mass of the
gold in the chain and the mass of the chain is . If a gold
ring is marked 18K and it weighs 0.4 oz, what is the value of
the gold in the ring if pure gold is valued at $300 per oz?

math - drwls, Wednesday, March 17, 2010 at 10:34am
18K gold is 18/24 = 75% gold, by mass.
A 0.4 oz 18K ring therefore contains 0.3 oz of gold.

Multiply 0.3 oz by $300/oz for the gold value in the ring. The other 0.1 oz is probably copper of negligible value.

That is a rather outdated question. Gold is worth $1100/oz these days.
GOLD DUST FOR SALE - BENSON IMO, Tuesday, January 17, 2012 at 4:17am
GOLD DUST FOR SALE

Dear Sir/ Madam,
We are small scale Gold miners here on the sub-region of West Africa. We have some huge

quantity of alluvial Gold Dust for sale at a considerable price of $30,500USD per kilo

which is below world market price, 22 carat and 92.05% purity. If you are interested, do

not hesitate to get back to us as soon as possible for us to give you our full co-operate

offer (FCO)
Best Regards
MR BENSON IMO

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