Question

A bar of soap with dimensions 2 x 4 x 0.5 inches is sold for $3 individually. A three-pack of the same soap costs $8. How much do you save per cubic inch of soap if you buy the three-pack?

$1.00

$5.00

$0.75

$0.08

Answer 1

$0.08

Explanation:

Had it on my test <3

Answer 2

we know that
volume of a bar of soap=2*4*0.5----> 4 in³

A bar of soap is sold for $3 individually
so
$3/4-----> 0.75 $/in³

A three-pack of the same soap costs $8
so
$8*(3*4)----> 0.67 $/in³

if you buy the three-pack you save-----> [0.75-0.67]=0.08 $/in³

the answer is
$0.08