Question

You need to buy some chicken for dinner tonight. You found an ad showing that the store across town has it on sale for $3.19 a pound, which is cheaper than your usual neighborhood store, which sells it for $3.49 a pound. Is it worth the extra drive?First, determine what information you need to answer this question, then click here to display that info (along with other info).How much chicken will you be buying? 3 poundsHow much far are the two stores? My neighborhood store is 2.5 miles away, and takes about 9 minutes. The store across town is 8.7 miles away, and takes about 26 minutes.How kind of mileage does your car get? It averages about 24 miles per gallon in the city.How many gallons does your car hold? About 15 gallonsHow much is gas? About $3.67/gallon right now.

Answer 1

First, calculate the difference in cost between buying 3 pounds of chicken across town and buying it in your neighborhood.

`3(3.49-3.19)=3(0.30)=0.90`

This is $0.90

Then, the distance between the two places is

`8.7-2.5=5.2`

The difference in distance is 5.2 miles.

Find the number of gallons needed to drive 5.2 miles,

`(5.2)/(24)=(13)/(60)gallons`

Then, multiply the number of gallons by the cost per gallon of gas, as shown below

`(13)/(60)*3.67=0.795166...`

Then, the total savings are

`Savings=0.90-0.795166...\approx0.10`

You would save $0.10 if you drive across town. The expended time can not be quantified in dollars. The extra drive is worth it.