# Homework Help: Problem with unit conversion question

1. Sep 10, 2008

### guitarf1

See attached image.

I can't figure out if its an issue with the Aris online system or a calculation error.

$1.40/15 cubic ft is equivilant to$140/424.752699 liter. Then I divide $140/424.752699 to obtain$.003 as being rounded to 3 sig figs. Is there something wrong with this conversation?

Thanks in advance for any input. Its really frustrating to not know the fault of your work.

Doug

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2. Sep 11, 2008

### symbolipoint

The image was uninterpretable; otherwise I would try to help.

Did you want to convert dollars per cubic feet into dollars per liter? What are all the ratios you are using? Basically you only need ratios sufficient to change cubic feet to liters.

Think: feet>inches>centimeter, and from there you can find your cubic centimeters and milliliters, and directly your liters.

3. Sep 11, 2008

### Staff: Mentor

.003 is not three significant digits, leading zeroes don't count!