Question

Lamar bought 20 pounds of dog food for $4.99 for his dog, Buster. The next day, the shop down the street offered 50 pounds of the same brand of dog food for $12.50. Did Lamar get a better deal?

Answer 1

Lamar got a better deal.

Explanation:

Well, Lamar paid $`4.99` for `20` pounds of dog food. He's wondering if the sale of `50` pounds of dog food for $`12.50` is a better deal. To find that out, we need to know the individual price per pound of each brand, and compare those.

So, we want to know the price per pound, or `$/(pound)`. Using that system, we need to calculate `color(green)(4.99/(20))` and `color(red)(12.5/(50))`.

Those are `color(green)(0.2495)` and `color(red)(0.25)`, respectively. Now we can compare the prices (remember, we're looking for the best deal, meaning the smallest price tag). `0.25` in larger than `0.2495`, so the original deal is the best, by 0.0005 cents.