Find the cost per o of a gold alloy made from 30 oz of pure gold that costs $1284 per o and 60 oz of an alloy that costs $910 per ounce. (Round to nearest cent.

Question

help? need answer in $

Answer 1

 

Solution:

 

30(oz)  * 1,284($/oz)  + 60(oz) * 910($/oz) = $38,520 + $54,600 = $93,120 

• Notice above that the units of oz. cancel leaving dollars.

 

To find the cost per oz. divide $93,120 by 30(oz) + 60(oz) = 90(oz).

 

• $93,120/90(oz) = $1,034.67 per oz. (Answer)