Every year, around 25,000,000 kilograms (kg) of hair is cut in the United States. Each kilogram of hair contains about 0.0002 kg of zinc, and each kilogram of zinc is worth about 4 dollars.How many dollars worth of zinc is contained in hair cut in the US?

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Answer 1 · 2018-02-03T18:53:08

$20,000

Start with the givens. 25,000,000 kg of hair is cut, each kg containing 0.0002 kg of zinc. Use this to find how many kg of zinc there is.

#25000000 * 0.0002 = 5000#

Next, each kg is worth $4, so multiply 5,000 kg of zinc by 4.

#5000 * 4 = 20000#

Your answer is $20,000.