An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
To find out how much the animal population increases between year 5 and year 8, we need to calculate the difference between the population at year 8 and the population at year 5.
The population at year 5 can be determined by substituting t=5 into the rate equation: 150+20(5) = 250 animals per year.
Similarly, the population at year 8 can be calculated by substituting t=8 into the rate equation: 150+20(8) = 310 animals per year.
To find the increase in population between years 5 and 8, we subtract the population at year 5 from the population at year 8: 310 - 250 = 60 animals.
Therefore, the animal population increases by 60 animals between year 5 and year 8.