Question

A formula for infant feeding requires 13 oz. of evaporated milk and 18 oz. of water. If only 10 oz. of milk are available, how much water, to the nearest ounce, should be used?

Answer 1

`14` ounces

Explanation:

Set up a proportion.

`(13 "oz milk")/(18 "oz water") = (10 "oz milk") / (color(red)x "oz water")`

`13/18=10/color(red)x`

We can cross-multiply to find `x`.

`13*color(red)x=18*10`

`13*color(red)x=180`

`color(red)x=180/13`

`color(red)x=13.8 "oz"`

So, about `14` ounces of water should be used.