Question

Doughnuts cost $3.45 for a dozen at Store A, and cost $2.40 for 8

at Store B. Which store has a cheaper cost per doughnut? i need explains :)

Answer 1

Store A

Explanation:

First, we can clarify that one dozen = 12.

At store A, we have 3.45 = 12 donuts. For store B, 2.40 = 8 donuts. Let's say donuts at store A cost x dollars and donuts cost y dollars at store B. For each donut at store A, we add x dollars to the total. Therefore, if we had, for example, 2 donuts, the cost would be x + x = 2 * x. Similarly, the cost of 12 donuts would be 12 * x = 3.45. Dividing both sides by 12, we get

x = 0.2875

8 * y = 2.40

y = 0.3

0.2875 is less than 0.3, so we can say that donuts at store A are cheaper because their cost is lower.