An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (1)
Calculate the average population for each fish in Year 1: Trout = 4, Catfish = 9, Bass = 7.
Calculate the average population for each fish in Year 2: Trout = 9, Catfish = 9.5, Bass = 1.5.
Compare the average populations from Year 1 to Year 2.
Identify that Trout increased from 4 to 9, and Catfish increased from 9 to 9.5. Therefore, Trout increased its predicted average population. T ro u t in cre a se d i t s p re d i c t e d a v er a g e p o p u l a t i o n
Explanation
Calculate Average Populations First, we need to calculate the average population for each type of fish in both Year 1 and Year 2. To do this, we will average the two samples taken each year.
Year 1 Averages For Year 1:
Trout: 2 3 + 5 = 2 8 = 4
Catfish: 2 9 + 9 = 2 18 = 9
Bass: 2 8 + 6 = 2 14 = 7
Year 2 Averages For Year 2:
Trout: 2 8 + 10 = 2 18 = 9
Catfish: 2 10 + 9 = 2 19 = 9.5
Bass: 2 2 + 1 = 2 3 = 1.5
Compare Averages Now, let's compare the average populations from Year 1 to Year 2 to see which fish increased:
Trout: Increased from 4 to 9.
Catfish: Increased from 9 to 9.5.
Bass: Decreased from 7 to 1.5.
Conclusion From our calculations, we can see that both Trout and Catfish increased their average population from Year 1 to Year 2, while the Bass population decreased. Therefore, the correct answer is that Trout increased its predicted average population.
Examples
Understanding population changes in ecosystems can help in conservation efforts. For example, if we observe that a certain fish species is declining in a pond, we can investigate the reasons for the decline, such as pollution or overfishing, and take steps to address the issue. Similarly, an increase in a fish population might indicate a change in the ecosystem that needs further investigation.
