Question

Two competing corporations are submitting data to the US Military to create chemical hot packs. The Military has stipulated that each hot pack may cost no more than 85 cents and must result in at least a 20degrees Celsius rise in temperature when activated. Which of the following companies is the Military going to hire?
Company A - 1.5g of Y results in a 5degrees Celsius rise in temp. Cost of chemical: $184.04/kg
Company B - 1.0g of Z results in a 2.5degrees Celsius rise in temp. Cost of chemical: $97.13/kg

Answer 1

Co A.
How much is needed? That's
1.5g x (20/5) = 6.0 grams.
Cost of 6.0 g is
$184.04 x (6.0/1000) = about $1.10 each.

You figures Co B the same way.

Answer 2

Thank you DrBob, that helps a lot!