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Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447

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BuyFindarrow_forward

Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447
Textbook Problem

One special type of ratio is known as a rate. A rate is a ratio that compares two quantities that have different units, such as miles per hour, calories per serving, pounds per square inch, and price per unit. In consumer economics, expressing prices as “price per unit” allows us to determine the “best buy” when comparing various shopping choices. All else being equal, the best buy is the choice with the lowest price per unit (unit price).

Donna Kelsch is comparing dry cat food brands for her cats Nicki and Nasty. If Nicki and Nasty’s favorite, Funny Fish, comes in the three sizes listed below, which size is the best buy?

Hint: Determine the unit price for each size. Round to the nearest cent if necessary.

Size Price Unit Price
5 pounds $12.25
10 pounds $21.90
20 pounds $38.50

To determine

The best size to buy Funny fish food for the cats Nicki and Nasty from the following sizes,

Size Price Unit place
5 pounds $12.25
10 pounds $21.90
20 pounds $38.50
Explanation

Given Information:

The available sizes for Funny fish are as follows.

Size Price Unit place
5 pounds $12.25
10 pounds $21.90
20 pounds $38.50

Consider the available sizes for Funny fish,

Size Price Unit place
5 pounds $12.25
10 pounds $21.90
20 pounds $38.50

The best size will be determined by comparing the unit place for each size.

A unit place for each size is the cost of 1 pound Funny fish.

To compute the cost of 1 pound from 5 pounds divide the price $12.25 by the size 5, as,

Unit place for 5 pounds=12.255=2.45

To compute the cost of 1 pound from 10 pounds divide the price $21

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