This is not 4 different problems. It's the same problem 4 times.
The Rule: To find the unit rate, divide the price by the quantity. Just like you wrote in pencil next to #6 and #8 . _________________________________
#6). Look at The Rule up above.
Unit price for Brand A: $4.80 / 32 oz = 15¢ per oz. Unit price for Brand B: $5.76 / 48 oz = 12¢ per oz. Unit price for Brand C: $17.92 / 128 oz = 14¢ per oz.
#7). IF the price is the ONLY thing that's different about them, then Brand-B is the best choice, because it's the lowest price per ounce.
BUT ... there may be other things to compare: Do they all get your dishes equally clean ? Do they all rinse off equally easily ? Do they all smell the same ? Do any of them attract bugs when they stand around ? Do any of them spoil when they stand around open ?
You may want to consider other things besides the price when you're deciding which detergent to buy.
#8). Look at The Rule up above again.
Unit rate for Regular size = $3.36 / 16 oz = 21¢ per oz. Unit rate for Family size = $7.60 / 40 oz = 19¢ per oz.
<span>#9). </span>Again ... IF the cost is the ONLY thing to think about, then the Family size is the better buy, because it costs 2¢ less for every ounce. But there may be other things to consider. Does the peanut butter from both sizes taste the same ? Does one taste better ? Is the Family size so big that it might be hard to handle, and you may drop it by accident ?
I’m pretty sure the answer is 1.78 meters since it’s 1780 millimeters and that converted into meters is 1.78 meters, by the way don’t forget to add the unit too
