# 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?

$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.

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

Your answer is $20,000.

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To find the value of zinc contained in hair cut in the US, you can multiply the total amount of hair cut in kilograms by the amount of zinc per kilogram, and then multiply by the value of zinc per kilogram.

Total amount of hair cut in the US: 25,000,000 kg

Amount of zinc per kilogram of hair: 0.0002 kg

Value of zinc per kilogram: $4

Now, multiply these values together:

(25,000,000 \text{ kg} \times 0.0002 \text{ kg/zinc} \times $4/\text{kg})

(= 25,000,000 \times 0.0002 \times 4)

(= 20,000 \times 4)

(= $80,000)

Therefore, the value of zinc contained in hair cut in the US is $80,000.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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