Question

Every year roughly 25,000,000 kilograms 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 united states every year?

Answer 1

it's 20,000
hope this helps xx

Answer 2

`5000 kg Zn *(4dollars)/(Kg Zn) =20000 dollars`

So then the final answer would be $ 20000.

Explanation:

For this case we have a total amount of kg of hair cut in the USA (25000000 Kg), and we have tha rate of kg of zinc per each kg of hair:

`(0.0002 kg zn)/(kg hair)`

So we can find the kg of zinc in the total like this:

`25000000 Kg hair* (0.0002 kg zn)/(kg hair)= 5000 Kg zn`

And we have also the payment for each kg of zinc given by:

`(4 dollars)/(kg Zn)`

So we can find the total amount of money that this kg of zinc represent like this:

`5000 kg Zn *(4dollars)/(Kg Zn) =20000 dollars`

So then the final answer would be $ 20000.