Out of 10 I am stuck on 2 last Questions

Question

Hi,

After 21 years I decided to give college a go. And math I am just struggling with. Ang assistance with a break down I can visually see would be helpful. I am taking this class online and finding it harder then I thought. On verge of giving up :(

2. Soda

Find the unit prices per fl oz of three different soda products. Round to the nearest cent.

(A) Product: 2-Liter Bottle (B) 6 pack of Bottles (C) Case of Cans

Volume: 2L 101.4 fl oz 144 fl oz

Price: $0.99 $2.59 $3.49

(1 liter= 33.814 fl oz)

(A)=

(B)=

(C)=

Answer 1

In the first example, a 2 L soda bottle has 2 x 33.814 oz, or 67.628 oz. The key to Algebra word problems is in the units. The answer in this case, unit price, is in cost per unit. Cost is in $ and the units are ounces. The answer must be in $ per ounce, mathematically, $/oz. The problem becomes $.99/67.628 oz, or .014 $/oz. Rounding to the nearest cent, the correct answer is $.01/ounce.

Similarly, the second problem, assuming the 6 pack is 101.4 ounces, would be $2.59/101.4 oz. or .025 $/oz, rounded off to the nearest cent, $.02 per fl oz.

For the third problem, $3.49/144 oz works out to $ .024/oz, rounded off to $.02 per ounce.

KEY POINT: keep track of the units in word problems. Don't forget to round off correctly as instructed, dropping off anything less than 5 and rounding up any digit 5 or greater.