Final answer:
The mixture is weaker than it should be due to a lower concentration of concentrate compared to water.
Step-by-step explanation:
The question is asking whether a mixture of 4 cans of concentrate and 5 cans of water is stronger or weaker than it should be. To determine this, we need to compare the ratio of concentrate to water in the mixture to the desired ratio. If the desired ratio is greater than the actual ratio in the mixture, then the mixture is weaker than it should be. On the other hand, if the desired ratio is smaller than the actual ratio in the mixture, then the mixture is stronger than it should be.
In this case, since there are more cans of water than concentrate, the actual ratio of concentrate to water in the mixture is smaller than the desired ratio. Therefore, the mixture is weaker than it should be.
Learn more about concentration